Question

Choose the equation of the horizontal line that passes through the point (1, -5).

Answer 1

the choices are :
y = -5

x = 1

y = 1

x = -5

Answer 2

Because the line is horizontal, we just need to specify what the y co-ordinate is of all the points on the line. As the line passes through (1, -5) we know that that y value is -5. So the line is:
y=-5