1. Find the constant of variation for the quadratic variation. (01_12_LQ_1.gif )

14

35

7

21

2. Find the constant of variation for the quadratic variation.

(6y = 4x2)

4/9

2/3

3/2

–23. If f(x) varies directly with x2, and f(x) = 75 when x = 5, find the value of f(4).

100

50

48

25

1. Please post the first question again.

2. 4/6 = 2/3

3. f(5) = a * 5* 5 = 75

so a= 75/25 =3

f(4) = 3* 4* 4

= 48

4. g (7)= 98 = a x^2

98 = a * 7*7

so a = 98/49

=2

so g(x) = 2x^2

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