Question

Write the equation of a horizontal line that passes through the point (3, –3).

a. x=3
b. x=-3
c. y=3
d. y=-3

Answer 1

d. y=-3
since this is a point and the line must be horizontal it is important to look at the y of the coordinate given. y=-3 then gives you the answer to your question since at x=3 the line would be vertical; at x=-3 the line would be going through quadrant two and three instead of quadrant one and four; and y=3 would be going through one and two instead of quadrant one and four.