1 ) Label your x1, y1, and x2, y2 one your points
(-2, 9) (1, 3)
X1, Y1 X2, Y2
2 ) Slope is other known as m ; m = rise/run
m = y2 - y1 -> 3 - 9 -> 3 - 9
_____ _____ _____
x2 - x1 1 - (-2) 1 + 2
Do that math, it’s simple!☺️
And there’s your answer this is probably late but I still wanted to respond! Good luck with you math work!