Question

What is the range of the function f(x)=1/2x+3 when the domain is {-2, 0, 2}

Answer 1

$f(x)= \frac{1}{2} \cdot x+3 \\\\f(0)= \frac{1}{2} \cdot (-2)+3=-1+3=2 \\\\f(0)= \frac{1}{2} \cdot 0+3=0+3=3 \\\\f(2)= \frac{1}{2} \cdot2 +3=1+3=4\\\\The\ range=\{2;\ 3;\ 4\}$