A face is a single flat surface. Also vertical lines are perpendicular to the x-axis. The second lines equation was y 2 x 3 and the lines slope was m 2.
Vertical Angles Vertical Angles are the angles opposite each other when two lines cross Vertical in this case means they share the same Vertex corner point not the usual meaning of up-down.
In simple words vertical translation means it just moves the given figure either up or down without rotating re sizing or anything else. In both cases the number multiplied on the variable x was also the value of the slope for that line. A vertex is a corner. To find the value of x set the measure of the 2 vertical angles equal then solve the equation.