A student finds the slope of a line between (8, 17) and (1,4) she writes 17-14/1-8 what mistake did she make? A.) she used Y-values where she should've used x-values. B.) She should have added the values, not subtracted them. C.) she mixed up the x and y-values D.) she did not keep the order of the points the same in the numerator and the denominator