f(0) = 8 * 0 = 0
f(−2) = 8 * (−2) = −16
f(1) = 8 * 1 = 8
$f(\frac{1}{2})=8\ast <!--\; \ast \; -->\frac{1}{2}=4$

f(a) = 8a
f(−a) = 8 * (−a) = −8a
f(2a) = 8 * 2a = 16a
$f(-<!--\; -\; -->\frac{1}{4}a)=8\ast <!--\; \ast \; -->(-<!--\; -\; -->\frac{1}{4}a)=-<!--\; -\; -->2a$

f(b + 2) = 8(b + 2) = 8b + 16
f(1 − b) = 8(1 − b) = 8 − 8b
f(3b − 8) = 8(3b − 8) = 24b − 64
$f(7-<!--\; -\; -->\frac{b}{8})=8(7-<!--\; -\; -->\frac{b}{8})=56-<!--\; -\; -->b$

f(c) + 3 = 8c + 3
f(−3c) − 1 = 8 * (−3c) − 1 = −24c − 1
−f(c − 3) = −8(c − 3) = −8c + 24
−f(c) + 1 = −8c + 1