Question 174266
Vertical lines are of the form {{{x=a}}} where "a" is the x-coordinate of the point that the line goes through. In this case, the x-coordinate of the point (7,-6) is 7. So this means that the vertical line that goes through (7,-6) is {{{x=7}}}



Horizontal lines fit the form {{{y=b}}} where "b" is the y-coordinate of the given point. So in this case, the y coordinate of (7,-6) is -6 which means that the horizontal line is {{{y=-6}}}