Y varies directly to x

This section defines what proportion, direct variation, inverse variation, and joint variation are and explains how to solve such equations. A proportion is an equation stating that two rational expressions are equal.

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Y varies directly to x

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Phillip can paint square feet of wall per minute. What area of the wall can he paint in 2. Every minute Phillip completes another square feet of painting. To solve for the total area that he completes, we need to find the number of minutes that he works. There are 60 minutes in an hour, and he paints for 2. Multiply to find the total number of minutes. If he completes square feet per minute, then we can multiply by the total minutes to find the final answer.

Y varies directly to x

This section defines what proportion, direct variation, inverse variation, and joint variation are and explains how to solve such equations. A proportion is an equation stating that two rational expressions are equal. Simple proportions can be solved by applying the cross products rule. Checking to see if is a solution is left to you. That concept can be translated in two ways. The k is called the constant of proportionality. This translation is used when the constant is the desired result.

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Previous section Next page Direct Variation page 2. SparkTeach Teacher's Handbook. The statement " y varies directly as x ," means that when x increases, y increases by the same factor. Go ad-free AND get instant access to grade-boosting study tools! Suppose that y varies directly as x and inversely as z. Sign up and get instant access to creating and saving your own notes as you read. Please wait while we process your payment. Free trial is available to new customers only. First Name. Send password reset email. Start free trial of SparkNotes Plus. Direct Variation The statement " y varies directly as x ," means that when x increases, y increases by the same factor. Since k is constant the same for every point , we can find k when given any point by dividing the y-coordinate by the x-coordinate.

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This translation is used when the constant is the desired result. Password Your password must: Be between characters. Since k is constant the same for every point , we can find k when given any point by dividing the y-coordinate by the x-coordinate. Start 7-Day Free Trial. Your Email. If one variable varies as the product of other variables, it is called joint variation. Log in Sign up Sparknotes. This is not a valid promo code. Adam Bede has been added to your Reading List! As previously stated, k is constant for every point; i.