What is an equation of the line through (-1,4) with slope -3?

Question

What is an equation of the line through (-1,4) with slope -3? I need help! I have no idea what the answer is!

Answer 1

You can treat y=mx+b like any other formula. you have a value for x, that is -1, a value for y, which is 4 and the slope, m=-3. You can plug these in and find b, the y intercept. It would look like this.

 

4 = -3(-1) + b

4 = 3 + b

1 = b

 

Now write your equation replacing the m and b.

y = -3x + 1 is your answer.

 

Hope this helped.