Question

What is the point-slope equation of a line with slope -3 that contains the point (-8,-4)?

Answer 1

x=-8 y=-4 m=-3

y = mx + b

-4 = -3(-8) + b

-4 = 24 + b

-4 - 24 = -24 + 24 + b

-28 = b

y = -3x - 28

Explanation:

1. identify your x and y
2. write down the slope-intercept form formula
3. replace x and y with the values
4. distribute
5. do subtraction to get b
6. write the formula again with the values