Check on this website
file:///C:/Users/nadim/Downloads/Lesson%207%20Problem%20Set.pdf
Answer:-1/2
Step-by-step explanation: You just find the slope which is m=y2-y1
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x2-x1
You just literally mark the graph, you see the 1st points (2,12) go on the X axis to 2, then go up to 12 and mark that as a point. and continue with this tactic with the rest.