Calculate the slopes of the lines and find their product.
No, see solution.
Practice makes perfect
If our friend is correct and the path of the puck forms a right angle, then the two lines that form the path are perpendicular. Slopes of perpendicular lines are negative reciprocals, meaning their product is - 1. To check this, we first have to find the slopes.
First Line
From the graph we can tell that the line passes through the points (- 4,0) and (0,8). Let's substitute these points into the Slope Formula.
The second line passes through the points (0,8) and (- 4,16). Again, we will substitute these two points into the Slope Formula to find the slope of the second line that makes the path.
