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What's the equation of the line that passes through the points (–1,5) and (1,–1)?

User TJR
by
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1 Answer

3 votes

Answer:

y = -3x + 2

Explanation:

Use rise over run to find the slope of the line:

change in y / change in x:

-6 / 2

= -3

Plug in the slope and a given point into y = mx + b, and solve for b:

y = mx + b

5 = -3(-1) + b

5 = 3 + b

2 = b

Plug in the slope and b into y = mx + b:

y = mx + b

y = -3x + 2

So, the equation of the line is y = -3x + 2

User Marc Enschede
by
4.5k points