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Review Homework

Inverse Variation ??? ??. Inverse Variation. We use the same procedure to solve inverse variation problems as we did to solve direct variation problems. . ?. ?. Inverse Variation. Inverse is very similar to direct, but in an inverse relationship as one value goes up, the other goes down. There is n

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Review Homework

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    1. Review Homework Page 133-135

    2. Inverse Variation ??? ??

    4. Inverse Variation Inverse is very similar to direct, but in an inverse relationship as one value goes up, the other goes down. There is not necessarily a constant rate.

    5. Inverse variation Page 137 If a pizza costs 10,000 won and two people split it, it costs 5000 won each. If 4 people split it, it costs 2500 won each. x = the number of people, y = price they pay a = constant of variation = price of pizza Inverse variation is xy = a or y = a/x xy =10000 (5000)(2)=10000 and (2500)(4)=10000 With inverse variation, the x and y variables always have a product of a constant, a.

    6. Graphing Inverse Variation Unlike the graph of direct variation, the graph of inverse variation is not linear. Rather, it is a hyperbola or a rational function:

    7. Determine the constant, a of inverse variation when x = 2 and y = 6 and write the equation of inverse variation. What about when x = 3 and y = 4? With inverse variation one point on a graph is (6,3). What is the y coordinate of a point with x =2? (2, y). The time and speed of your trip vary inversely. You drive to school for 1 hour at 90km/h. If you travel at 60 km/h, how long will it take you? Problems

    14. With Direct variation we Divide our xs and ys. In Inverse variation we will Multiply them. x1y1 = x2y2

    15. If you have data a table of values or coordinates, if the product of y and x is the same number (a), it is inverse variation. If the quotient of y and x is the same number a, it is direct variation. Is this an example of direct or inverse variation? You buy bananas at 2000 won per pound. You determine the length and width of rectangles which have an area of 10. Determining which variation

    21. Homework Page 138-140

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