Question

Some values of functions f, g, h, and k are provided in the table below. Find a possible linear or exponential equation for each function.
X |f(x) |g(x) |h(x) | K(x)
0| 80 | 80 | 5 | 5
1 | 40 | 40 | 15 | 15
2 |20 | 0 | 25 | 45
3 | 10 | -40 | 35 |135
4 | 5 | -80 | 45 | 405
f(x) =_____
g(x)=_____
h(x)=_____
k(x)=_____