Question

if y is directly proportional to x² and the difference in the values of y when x= 1 and x=3 is 32, find the value of y when x= -2.​

Answer 1

Answer:

the value of y when x= -2. is

y =4

Answer 2

Answer:

y=kx^2                    For x= 1           y=k           For x=3          3y=9k

Now, 3y-1y=9k-k=8k=32

k=32/8        k=4

y=4x^2

So, Y=4(-2)^2

y=4(4)

y=16