Graphing art #1 parallel lines, what is the equation of the lines and all the lines in the graph

Find the length of cu, the triangles are similar.

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

If you apply the changes below to the linear parent function f(x)=x what is the equation of the new function vertically stretched by a factor of 3 flip over the x axis