Verified Answer :

The slope formula is \(\frac{Y2-Y1}{X2-X1}\). For the two points, \((x,y)\). You can pick any of the Y and X from these two points, but only once. \(\frac{9-15}{9-12}\) = \(\frac{-6}{-3}\) = 2 or \(\frac{15-9}{12-9}\) = \(\frac{6}{3}\) = 2 and both will equal to. The answer for the slope is 2.

olemakpadu

Slope = Change in y / Change in x

Between (9, 9) and (12, 15).

We would use the coordinates from the second point minus that from the first point.

1st point = (9, 9),  2nd point = (12, 15)

Slope =  (15 - 9) / (12 - 9) 

         =  6 / 3

         =  2 

Slope = 2

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