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Direct and Inverse Variation Review

Direct and Inverse Variation Review. MATH 7. What am I? direct, inverse, or both. As one variable increases, the other variable decreases. The graph is always a straight line. 3. The equation is. What am I? direct, inverse, or both.

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Direct and Inverse Variation Review

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  1. Direct and Inverse Variation Review MATH 7

  2. What am I?direct, inverse, or both • As one variable increases, the other variable decreases. • The graph is always a straight line. 3. The equation is

  3. What am I?direct, inverse, or both • As one variable decreases, the other variable decreases. • The equation is • The graph is never a straight line.

  4. What am I?direct, inverse, or both • It is a proportional relationship between 2 variables. • As one variable increases, the other variable increases.

  5. What am I?direct, inverse, or both • When x and y are multiplied, the result is a constant (k). 10. When y is divided by x, the result is a constant (k).

  6. Solve each problem: • X varies inversely with y. If x = 10 when y = 2, what is the value of y when x = 4? 2. X varies inversely with y. If x = 7 when y = 12, what is the value of y when x = 4?

  7. Solve each problem: • y varies directly with x. If y = 16 and x = 2, what is the value of y when x = 5? 4. y varies directly with x. If y = 36 and x = 4, what is the value of y when x = 5?

  8. Solve each problem: • Alex has $28 to spend on cd’s and dvd’s. If he buys 4 cd’s, he will be able to buy 7 dvd’s. How many cd’s would he be able to buy if he only bought 14 dvd’s?

  9. Find the constant: • X and y vary inversely: y=2.5 and x=4 • X and y vary directly: y=25 and x=2

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