Question

write the equation for the horizontal line that contains point e(-10, 1)

Answer 1

The equation for a horizontal line is: y = constant ----- (1)
because ALL points on a horizontal line have the same y-coordinate which is the constant in the equation (1).
It passes through the point (10,1). What is the y-coordinate of this point? The y-coordinate of this point will be the constant in equation (1).