A softball academy charges students an initial registration fee plus a monthly fee. The graph shows the total amounts paid by two students over a 4 month period. The lines are parallel.

I can't actually see the graph but i'll try to help

Step-by-step explanation:

if we use the formula y=mx+b

m=monthly fee

b=initial registration fee

x=amount of months charged

y=total sum paid

So you fill in the formula using the values on the graph

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.