Question 160223
(4,3) and (12,4).
Slope=(4-3)/(12-4)=1/3
3=1/3+b
b=3-/3
b=(3*3-1)/3
b=(9-1)/3
b=8/3 answer for the y intercept.
y=x/3+8/3
{{{ graph( 300, 200, -6, 5, -10, 10, x/3 +8/3) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, x/3 +8/3).