Part 1
To calculate the slope of Graph D, we pick any two points on line D.
The points we have chosen are (8,0) and (7,4).
[tex]\begin{gathered} \text{Slope}=\frac{Change\text{ in y-axis}}{Change\text{ in x-axis}} \\ =\frac{4-0}{7-8} \\ =\frac{4}{-1} \\ =-4 \end{gathered}[/tex]
The slope of the line in Graph D is -4.
Part 2
The line in Graph E is a horizontal line.
The slope of any horizontal line is 0.
The graph could represent the speed of a car in park (i.e not moving at all).
Part 3
If the indicated point is (0,0).
For the line to have a slope of -2, the other point will be:
[tex](1,-2)[/tex]
The drawn graph is attached below:
This means that we start at the given point, and go down 2 over 1.
The correct choice is 3.
