Question

Hey, if I could get some help on this i'd really appreciate it.

QUESTION 1

What is the constant of variation for the quadratic variation?
0.1y = 3x^2

0.03

0.1

30

3

QUESTION 2

What is the constant of variation for the quadratic variation?
10y = 6x2

6

1.6

10

0.6


QUESTION 3

If f(x) varies directly with x^2, and f(x) = 96 when x = 4, find the value of f(2).

32

24

72

192


QUESTION 4

Write a quadratic variation equation if g(x) varies directly with x^2, and g(x) = 98 when x = 7.

g(x) = 2x^2

g(x) = 7x^2

g(x) = 1/2x^2


g(x) = 14x^2

Answer 1

1) When you rewrite the equation as
.. y = kx^2
The value of k is 3/0.1 = 30.

2) When you rewrite the equation as
.. y = kx^2
The value of k is 6/10 = 0.6.

3) f(x) = kx^2
.. k = f(x)/x^2 = 96/4^2 = f(2)/2^2
.. f(2) = 96(2/4)^2
.. f(2) = 24

4) g(x) = kx^2
.. 98 = k*7^2 = 49k
.. k = 98/49 = 2
g(x) = 2x^2