Question

What is the equation of the line that passes through the points (-1, 3) and (1, 11)?

Answer 1

y-3={(-1-1)/(3-11)}(x+1)

Answer 2

\[ \frac{y1-y2}{x1-x2}=4\]

y=mx+b
y=4x+b

3=4(-1)+b
3+4=b
b=7

y=4x+7