Answer:
C. She did not keep the order of the points the same in the numerator and the denominator.
Step-by-step explanation: Hope this helps
The correct slope should look like: 1-17/14-18
If you do 1-17 for the numerator then 14-18 must be the denominator (the slope is 4: -16/-4 = 4)
The equation to find the slope of a line is (y2-y1)/(x2-x1). (x1,y1) is the first coordinate point, (x2, y2) is the other. It does not matter which coordinate point you use first, as long as you remain consistent.
14,1
x1 y1 18,17
x2 y2
17-1 =16/12
18-4