Question

determine whether the following equation defines y as a function of x.
$x + y = 25$
does the equation $x + y = 25$ define y as a function of x?
\bigcirc yes
\bigcirc no

Explanation:

Step1: Isolate y in the equation

Rearrange $x + y = 25$ to solve for y:
$y = 25 - x$

Step2: Verify function definition

For every input x, there is exactly one output y.

Answer:

Yes