The slope of a line that passes through the points (-9,8) and (-21,10) is -1/6
What is slope?
The slope of a linear graph is the rate of change of the graph
From the question, we have the following ordered pairs
(x,y) = (-9,8) and (-21,10)
So, the rate of change (m) is then calculated as:
[tex]m =\frac{y_2 -y_1}{x_2 -x_1}[/tex]
This gives
[tex]m =\frac{10 - 8}{-21 + 9}[/tex]
Evaluate the differences
[tex]m =\frac{2}{-12}[/tex]
Evaluate the quotient
[tex]m =-\frac{1}{6}[/tex]
Hence, the slope is -1/6
Read more about rate of change at:
https://brainly.com/question/1884491
