Answer
please see image
.
Work Step by Step
Graphically,
$m$ is the slope of the line $y=mx+b$:
$m=\displaystyle \frac{\Delta y}{\Delta x} =\displaystyle \frac{Rise}{Run}$
b is the y-intercept
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From $y=2x-1$ we read:
slope=2,
y-intercept: $-1$.
Following the procedure outlined in the examples on p.80, we
1. Determine the y-intercept, and plot the point $(0,-1)$
2. Use the run-rise logic:
for an incraese in x by 1,
y will increase by 2.
Moving to the right by one unit from $(0,-1)$,
the point we arrive at is $(0+1,-1+2)=(1, 1).$
Plot the second point.
Two points define a line.
Draw a straight line through these two points.
