Question

determine whether the following equation defines y as a function of x.
$x + y = 29$

does the equation $x + y = 29$ define y as a function of x?
yes
no

Explanation:

Step1: Rearrange for y in terms of x

$y = 29 - x$

Step2: Check function definition

For every $x$, there is exactly one $y$.

Answer:

Yes