Question

What is the equation for a line that passes through the point (-1,4) and has a slope of -3

Answer 1

y = - 3x + 1

Explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - 3, thus

y = - 3x + c ← is the partial equation

To find c substitute (- 1, 4) into the partial equation

4 = 3 + c ⇒ c = 4 - 3 = 1

y = - 3x + 1 ← equation of line

Answer 2

y=-3x+1

Explanation:

y=mx+b

-3=m

b=-1

y=-3x+1

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