The equation of the line is y = -7
Generally, we can write the equation of a line in the slope-intercept form as;

where m is the slope and b is the y-intercept
We already have the slope as 0, so the equation will be;

To get the value of b in this case, we only need to put in the y-value of the point through which the line passes
In this case, the point is -7 and thus;

The equation of the line is thus;
