Answer:
Step-by-step explanation:
Explanation:
Because the y-axis is represented by an equation where x is equal to a number (x = 0), it is a vertical line with an undefined slope.
The line perpendicular to this line will be horizontal with a slope of 0.
To find the equation of the perpendicular line, set y equal to the y-coordinate of (-4,7):
y = 7.
