Question

A student finds the slope of the line between (8, 17) and (1, 4). She writes . What mistake did she make?

Answer 1

Slope: $\frac{y_2-y_1}{x_2-x_1}$ where --
                    (8, 17) = ($x_1, ~y_1$)
                    (1, 4) = ($x_2,~y_2$)

Slope = 13/7