Astudent found the slope of a line that passes through the points (1, 14) and (3, 4) to be 5. what mistake did she make?

The student interchanged the calculations when finding the values of change in x and y;
The student may have started by 14-4 but started with 3-1 for change in x.

M = (y2-y1)/(x2-x1)
 = (4-14)/(3-1)
 = (-10)/(2)
 = -5
slope is -5

None of those are technically correct. 9.7 x 104 is actually 1,008.8, but if that answer was a choice, it would be that one. if you meant 9.7 times maybe a thousand or more or divided by 10 or more, than the answer choices would be correct, but other than that, they actually arent.