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{{ printedBook.courseTrack.name }} {{ printedBook.name }} Since the lines are parallel, we only need to determine the slope of one of them. Let's choose $y=f(x)$ since this is the only line that seems to match two points with integer values. Select a pair of points on the line.

The line $y=f(x)$ passes through $(0,3)$ and $(1,5)$. Now the slope can be calculated using the two points and the slope formula.$m=x_{2}−x_{1}y_{2}−y_{1} $

$m=1−05−3 $

$m=2$