Which equation is a function of x?
x=5
x=y^2+9
x^2=y
x^2=y^2+16

 The answer is (c) x² = y.

Step-by-step explanation: We are given four options out of which we are to select the one which is a function of 'x'.

To be a function of 'x', the equation must involve 'y to the power 1' only.

The first option is

which is constant and so this option is incorrect.

The second option is

which is incorrect because it involves y².

The third option is

which is correct because it involves a single power of y.

The fourth option is

which is also incorrect because it involves y².

Thus, (c) x² = y is the correct option.

hiking down a winding trail.

step-by-step explanation:

well the answer to that is xoxoxo

step-by-step explanation: