Answer:
Step-by-step explanation:
Horizontal lines have the form " y = " where vertical lines have the form " x = ".
Horizontal lines run parallel to the y = 0 line, the x-axis, so horizontal lines are found in the y coordinate of the point. Therefore, the horizontal line at that point is y = 7.
The vertical lines run parallel to the y-axis, which is the line x = 0. The vertical lines are found then in the x coordinate of the point. Therefore, the vertical line at that point is x = -10
