Answer:
y = - 9 and x = 7
Explanation:
The equation of a horizontal line parallel to the x- axis is
y = c
where c is the value of the y- coordinates the line passes through
The line passes through (7, - 9) with y- coordinate - 9 , then
y = - 9 ← equation of horizontal line
The equation of a vertical line parallel to the y- axis is
x = c
where c is the value of the x- coordinates the line passes through
The line passes through (7, - 9) with x- coordinate 7 , then
x = 7 ← equation of vertical line