A student finds the slope of the line between (14, 1) and (18, 17) She writes 1/ 18 17/14 What mistake did she make?
a. She did not keep the order of the points the same in the numerator and the denominator
b. She used y-values where she should have used x-values.
c. She mixed up the x- and y-values.
d. She should have added the values, not subtracted them.