ANSWER and EXPLANATION
5. A line only has a slope of 0 if that line is a horizontal line. Hence, we have to identify the horizontal lines on the boat.
The horizontal lines on the boat are:
[tex]EF,\text{ }BC,\text{ }CA,\text{ }and\text{ }BA[/tex]
Those are the lines with a slope of 0.
6. A line only has an undefined slope if that line is a vertical line. Hence, we have to identify the vertical lines on the boat.
The vertical lines on the boat are:
[tex]DF,\text{ }FC,\text{ }and\text{ }DC[/tex]
Those are the lines with an undefined slope.
7. To find the slope of ED, apply the formula for the slope of a line:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
where (x1, y1) and (x2, y2) are two points that lie on the line.
The points (x1, y1) and (x2, y2) are(-11, 4) and (-10, 5). Hence, the slope of the line is:
[tex]\begin{gathered} m=\frac{5-4}{-10-(-11)}=\frac{5-4}{-10+11} \\ m=\frac{1}{1} \\ m=1 \end{gathered}[/tex]
That is the answer.
