The graph of y = x² is the solid black graph below. Which function
represents the dotted graph?

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus

its kinda hard to answer this when we dont have all the information that we need.

the answer is b 4pi/3

got it down chief.