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How do you draw a frequency polygon?

Draw a histogramUsing the data in question, formulate the class intervals. Construct a table showing the class intervals and the corresponding values of the frequencies. The table makes it easy for you to draw the histogram. Use a pencil and a ruler to draw the Cartesian plane. Let the x-axis represent the class intervals, whereas the y-axis shows the frequencies of the class intervals. Plot the values of the frequencies against the class intervals. Draw the bars of the histogram to represent this data.Calculate the values of the midpointsFind the value of the midpoint of each class interval. ..

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How do you calculate the cost of goods purchased?

The first step to determining the cost of goods purchased is to locate the cost of sales on the balance sheet or income statement. The cost of sales includes the price of products, the cost of labor to produce products, materials, delivery costs and any other expense related to selling a product. Next, subtract the amount of products purchased by cash or credit. This figure is the total cost of goods purchased.\nIf the amount is positive, the business is selling products at an appropriate price, and the business has made money. If the number is negative, the price of the product exceeds the co..

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What is an inequality graph?

To plot inequalities, it is important to have a solid understanding of graphing line equations in slope intercept form. The process of graphing inequalities contains three steps:Rearrange the equation so "y" is the only thing on the leftPlot the "y =" line with a solid line for y ≤ or y ≥, or a dashed line for yShade above the line for "greater than," whether y > or y ≥ , or below the line for "less than," whether yAll points within the shaded area express correct answers to the equation

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How do you solve rational equations?

Find the common denominatorConsider a very simple example: 9/10 = 3x/10. Realize that the common denominator is 10 and multiply both sides by 10 to yield 9 = 3x. Divide both sides by 3 for the solution: x = 3.\n\nConsider a slightly more complex example: (x-4)/12 = 1/4. Identify 4 as a factor of 12, making 12 the common denominator. \n\nConsider an even more complex example: 4/(x+3) - 2/x = 3/4x. Multiply (x+3) by 4x to get 4x(x+3) which is the common denominator, since x is a factor of 4x.Multiply through by the common denominatorTake the second example from Step 1. Multiply the right side of..

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How do you tell if a relation is a function?

Once a relation has been graphed, the vertical line test can be used to determine if the relation is a true function. To perform the vertical line test, take a pencil or pen and lie it vertically at the start of the graph. Next, move this vertically positioned pencil in a horizontal line from the beginning of the graph to the end. If the pencil only ever touches one point on the graph at one time, then the relation is a function. This test works because a function is a relation in which every x-point only has one y-point.

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What are some cute math equations?

Bound energy, in the above equation, is defined as the energy of a system unavailable to do external-type work. Mechanically, the term is synonymous with the quantity of heat "Q" that is transmitted into the body at "T" or temperature to elevate its entropy to a value of "S." Free energy represents the leftover energy that can be converted into external work.\nIn 2010, Tony Dooley, an Australian math professor, sent out a press release for a newly founded fiancée equation meant to determine the best age to propose, reports Hmolpedia. To calculate the formula, a person decides the oldest age h..

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What is the difference between percentage and percentile on test scores?

Percentile ranks are used for tests where it is important to compare one test-taker's results to a large sampling of data. For example, doctors have special growth charts to rank children's height and weight by percentile. Children who fall into very high or very low percentiles are evaluated for health issues. Percentages are used in tests where individual performance is more important than relative performance. A doctor treating a child who has 40 percent lung function does not need to know the child's percentile.\nStandardized tests often use percentiles to determine the best..

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What are conjunctions and disjunctions in math?

One way to evaluate compound propositions is to use a truth table. A truth table lists the four possible outcomes that can occur with two propositions. For example, if there are two statements A and B, the four possible combinations are: A and B are both true, A is true and B is false, A is false and B is true, and A and B are both false. A conjunction is true in the first case, when A and B are both true, and is false in the other three cases. A disjunction is true in the first three cases and is false only in the last case, when A and B are both false.

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What is a composite number?

All whole numbers greater than zero are either prime numbers or composite numbers. A prime number can only be divided evenly by itself and one, whereas a composite number can also be divided evenly by a third number. The first four composite numbers counting from zero are four, six, eight and nine. Each composite number is also the product of two or more prime numbers.

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How do you bisect an angle?

Draw the vertex arcDraw an arc by placing the point of the compass on the vertex of the angle (where the two legs of the angle meet). The radius of the arc can be any length, but it is preferable to choose a moderate radius so that there is enough space for the following steps.Draw two interior arcsPlace the compass point on the cross section of the vertex arc and one leg of the angle. Then draw another arc in the interior of the angle. Repeat this step for the other leg not changing the compass setting. This radius can be the same as the vertex arc or greater, but it is preferable to use the ..

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