The answer is A because there are only acute angles
1. Over a period of 6 years (from 1980 to 1986) the house gained a value of 12000 dollars (109k-97k). 12000/6 gives you a rate of 2000 dollars per year. Because the initial price at t=0 is 97000, the function is 97000+2000t
It should be 100 because it has to add up to 180 and 50+30=80 so the third angle must be 100
