Question

17
What is the slope of the line that contains the points (-1, 9) and (5, 21)?

Answer 1

slope found by rise over run or m = (y2 - y1) / (x2 - x1)

orientation is important to not mix either values order.

( 9 - 21) / ( -1 - 5) => ( -12 ) / ( - 6 )

negatives cancel and simplify to find

m = 2