Which equation represents a line that passes through the points (7, 5) and (6, 1)?

Answer 1

m = (1-5) / (6-7) = -4/-1 = 4
y = 4 x + b
1 = 4*6 + b
b = -23
so
y = 4 x - 23
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check (6,1) ??
1 = 4*6 -23 yes
5 = 4*7 - 23 Yes whew !!!