Question

How do you write equations for the vertical and horizontal lines passing through the point (8, -7)?

Answer 1

For a vertical line the value of x, in this case 8, will never change. This will be true for any value of y. Therefore the equation for a vertical line passing through this point is:

x=8

Likewise, for a horizontal line the value of y , in this case −7, will never change. This will be true for any value of x. Therefore the equation for a horizontal line passing through this point is:

y=−7