Solve the problem.
-Find the equation of the image of the line $y = x + 9$ when reflected in the $x$-axis.
A) $y = - x - 9$
B) $y = x - 9$
C) $\mathrm { y } = - \mathrm { x } + 9$
D) $y = x + 9$

Question

Quizplus · Accepted Answer

When a line is reflected in the $x$-axis, the $y$-coordinate of every point on the line changes its sign, while the $x$-coordinate remains the same. Therefore, the equation $y = x + 9$ becomes $y = -x - 9$.

Solve the Problem y=x+9y = x + 9y=x+9 When Reflected in The

Solve the Problem $y = x + 9$ When Reflected in The