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Panagiotis Simakis · Answer 1 · 2017-12-26T11:00:54+0000

The equation of a line is normally of the form: y = mx + b ;
where m = slope and b = y int.
m = 10-70/5+15
= -60/20
= -3
y = -3x + b
plug in any given point:
10 = -15 + b
b = 25

Therefore: y = -3x+25

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