Question

what is the slope of the line through (1,9) and (5,3)

Answer 1

\[\large \frac{y_2 - y_1}{x_2 - x_1}\]

Answer 2

\[\large m = \frac{3 - 9}{5-1}\]

Answer 3

\[\large m = \frac{-6}{4}\]

Answer 4

\[\large m = -\frac{3}{2}\]

Answer 5

Slope 'm' of a line passing through to points (x',y') and (x",y") is:
\[m=\frac{y'-y"}{x'-x"}\]

You have your two points inhere - just substitute and calculate.