Whoever answers this problem will get big brain bonus and please “SHOW your work” I’m not fond of people just posting to get points. I’m sure a lot of others on here would agree

answer: do we write it

step-by-step explanation:

so mark-up is 0.4 multiplied by 180 = 72

graphs that are inverses of each other are graphs where their slopes are reciprocals of each other for example say you have an original equation of y=2x. the inverse of that graph would be y=-1/2(x). also when you see a graph where the original and the inverse is graphed the angle around intersection is 90 degrees.