Question

Write slope-intercept form an equation of the line passes through (-1,-1), (1,5)

Answer 1

Knowing that slope-intercept form is y=mx+b. mx being the slope and b being the y-intercept.

First, you will first find the slope, which is (y2-y1)/(x2-x1):
5-(-1) / 1-(-1) = Which becomes 6/2.
6/2 = 3. So the slope is 3x

Now when you plot the dots on a graph with a slope of 3 (basically 3/1 knowing that slope is rise over run) you will see that the point that intercepts on the y-axis is 2. So your y-intercept, or b in this equation, is 2.

I believe the slope-intercept form: y=3x+2