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f(2) = - 2 ⇒ a(2) + b = -2 ⇒ 2a + b = -2
f(-2) = 6 ⇒ a(-2) + b = 6 ⇒ -2a + b = 6 -
4a = -8
a = -8/4 = -2
2a + b = -2
2(-2) + b = -2
-4 + b = -2
b = -2 + 4 = 2
f(p) = -3 ⇒ a(p) + b = -3
(-2)(p) + 2 = -3
-2p = -3 - 2
p = -5/(-2) = 5/2
f(-3) = q ⇒ a(-3) + b = q
(-2)(-3) + 2 = q
6 + 2 = q
8 = q