How do i find slope i have do do a slope maze but i can’t find the answer to the starting problem

part a:

house 1 function is exponential

house 2 function is linear

explanation:

house 1 value is increasing by 4% each year

house 2 value is increasing by 11,000 each year

part b:

house 1 function:   f(x)=179000(1.04)^x

house 2 function: f(x)=179000+11000(x)

part c:

house 1: f(30)=580568.15

house 2: f(30)=509000

580568-509000=71568 thus, house 1 yields a better roi (return on investment)