Question

I have a question on the last part. That I don't understand.

Answer 1

find H(0).. that will be your y-intercept.

Answer 2

I am not sure what you mean?

Answer 3

He means x= 0 find value of y

Answer 4

okay so does that mean I have to set up x^2-36, x^4-81 to 0

Answer 5

when ever a curve crosses the y-axes, its x value is always zero.
so, to find the y-intercept, you just need to evaluate the function at x=0