What is the equation of the function shown in the graph, given the equation of the parent function is f(x)=3.5x ?

g(x)=3.5x−2

g(x)=3.5x+1.5

g(x)=3.5x+1

g(x)=3.5x−1

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?