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{{ printedBook.courseTrack.name }} {{ printedBook.name }} Two graph the lines, we'll start by writing their equations. Let's recall the slope-intercept form of a line. $y=mx+b $ Since the lines are parallel, they will have the same slope and we know that it should be between $0$ and $1.$ For example, we can let $m$ be $21 .$ $y_{1}=21 x+b_{1}y_{2}=21 x+b_{2} $ In the above formula, $b$ represents the $y-$intercept. We know that the difference between them should be $3.$ Thus, we can choose $b_{1}=4$ and $b_{2}=1$ since $4−1=3.$ $y_{1}=21 x+4y_{2}=21 x+1 $ The above lines have the same slope, $21 ,$ and their $y-$intercepts are $4$ and $1.$ We can use this information to graph them in a coordinate plane.

Note that there are infinitely many solutions for this exercise. We are showing one of them.