a. Let x=0 correspond to 2010 and x=20 correspond to 2030. Find C and a so that f(x)=Cax models the data. b. Estimate the gas concentration in 2029.

Question

The table lists future concentrations of a certain greenhouse gas in parts per billion​ (ppb), if current trends continue.

Year	2010	2015	2020	2025	2030
Gas​ (ppb)	0.71	0.78	0.87	0.96	1.06

Answer 1

f(x)= .35x/20 = .07x/4

f(19)= .35(19)/20= .07(19)/4= 1.36/4= .34

.34+ .71= 1.05 ppb