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3 May, 20:51

Identify as inverse, direct, joint or combined. 1. y=7x. 2. xy=24. 3. F=4/R. 4. m/n=4. 5. i=2pr. 6. R=cl/r^2. 7. A=pir^2. 8. V=pir^2h.

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  1. 4 May, 00:04
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    1. y = 7x. This is an example of direct variation as the value of y also increases if the value of x is increased.

    2. xy = 24. This is an example of inverse because the value of y is decreased when x is increased.

    3. F = 4/R. This is inverse variation for the same reason as number 2.

    4. m/n = 4. Direct variation. For the same reason as number 1.

    5. i = 2pr. Joint variation. The value of i is dependent on the values of two other variables.

    6. R = cl/r². Joint variation.

    7. A = pir². Direct variation. I believe pi here is for π, leaving only A being dependent only to value of r.

    8. V = pir²h. Joint variation.
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