Question

If the function rule is y = x/2 + 3 and x = 8, what is the value of y?

Answer 1

You only need to replace the value of x in the function rule. You'll get:
$y=\frac{x}{2}+3=\frac{8}{2}+3=4+3=7$

Answer 2

y = x/2 + 3          x = 8

y = 8/2  + 3

y = 4 + 1

y =5