Question

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

Answer 1

y = -3x+8

Explanation:

We can use the slope intercept form of an equation

y = mx+b where m is the slope and b is the y intercept

y = -3x+b

Substitute the point into the equation

-1 = -3(3)+b

-1 = -9+b

Add 9 to each side

-1+9 = -9+9+b

8 =b

y = -3x+8