line (0,4),(-3,0)
The slope between the two points is y2 -y1x2 -x1: 0 -4-3
⇥ⓘ Adding 0 changes nothing: 0 -4 = -4■The minus signs of the numerator and the denominator cancel out: -4-3 = 43
⇥ 43
The line passes through the first point with this slope: y = 43·x + 4
ⓘ Multiplying a fraction by a term multiplies its numerator: 43·x = 4x3
▶Line:   y = 4x3 + 4