Question

Write an equation for the horizontal line passing through the point Y (3, -2).

Answer 1

y = -7
the equation of a straight line is
y = mx +b, for a horizontal line m = 0
so y = b and since the line must pass through x = -3, y = - 7
b must be -7

Answer 2

-7 was not even one of my choices but thanks though.