Rewrite the expression in exponential form

Step-by-step explanation:

A root can be converted to a power by taking the base of the root (in this case 4) and making it 1 over that number, so in this case

If it were the fifth root you would make it to the 1 over 5 power.  

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).