Question

if y is directly propotional to x^2 and the differnce in the values of y when x=1 and x=3 is 32 find the values of y when x=2

Answer 1

Answer:

16

Step-by-step explanation:

Given y is directly proportional to x^2, means there is a constant k so that y = k * x2.

 

For x = 1 y(1) = k and for x =3 y(3) =9k

Now y(3) - y(1) = 9k - k = 8k = 32

k = 4

 

The relationship is y = 4x2

 

For x = -2, y = 4 * (-2)2 = 16

Answer 2

Answer:

k=4

x=-2

y=16

Step-by-step explanation:

mark me as brainlist