Question 79918
*For future reference, please post under the correct title. It makes it more easier for tutors to help you; your question does not pertain to quadratics.

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Slope = (y2 - y1)/(x2 - x1)

Just substitute the points in. 

X2 in this case would be 2, and Y2 in this case would be 2 as well.

Try and solve it on your own now.