Question

Which of the following correctly identifies the quadratic function
that is related to the square root function ?
(1 point)
k (x) = 5 x−√
m (x) =
1
5
x
2
m (x) = 5x
2
m (x) =
1
25
x
2
m (x) = 25x
2

Answer 1

Assuming k(x) = √(5x), its inverse is found by swapping x and y:

y = √(5x) -> x = √(5y) -> x^2 = 5y -> y = (1/5)x^2.

So the related quadratic is m(x) = (1/5)x^2.