The y = mx + b equation is
y = 4/3x -5
where b is the y-intercept.
WATCH as we go from the origin (0,0)
to the y-intercept (b) at (0,-5).
Slope m is a fraction, rise/run or 4/3.
The line has a uniform slope
from (0,-5) to (3,-1).
WATCH the animation of the rise of 4.
WATCH the animation of the run of 3.
NOTE the plot of the actual points,
(0,-5) and (3,-1).
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