Which graph has figures that can undergo a similarity transformation to justify that they are similar?

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Evaluate cos2θ for cosθ = square root of 3/2