Question

What is the equation of the blue line?

Answer 1

Explanation:

two points on the line are (0,-3) and (1,1)

slope=(y2-y1)/(x2-x1)=(1-(-3))/(1-0)=4/1=4

eq. of line through point (x1,y1) with slope m is

y-y1=m(x-x1)

eq. of line is y+3=4(x-0)

y=4x-3