Question

Line AB contains points A(4, 5) and B(9, 7). What is the slope of AB?

O-5/2
O-2/5
O2/5
O5/2

Answer 1

`A(\stackrel{x_1}{4}~,~\stackrel{y_1}{5})\qquad B(\stackrel{x_2}{9}~,~\stackrel{y_2}{7}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{7}-\stackrel{y1}{5}}}{\underset{run} {\underset{x_2}{9}-\underset{x_1}{4}}} \implies {\LARGE \begin{array}{llll} \cfrac{2}{5} \end{array}}`

Answer 2

slope= 2/5

verticals change over horizontal change

7-5 2
—— = —-
9-4 5