Answer:
q = -9
Explanation:
(3, -15), (4, -21)
(-21 + 15)/(4 - 3) = -6/1 = -6
y + 15 = -6(x - 3)
y + 15 = -6x + 18
y = -6x + 3
q = -6(2) + 3 = -12 + 3 = -9
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