What is the 5th term in the sequence?

The fifth term is just the next term. One possible answer can be obtained by looking at the differences in the first four terms: 2 (=3–1), 4 (=7–3) and 8 (=15–7). They are 2^1, 2^2 and 2^3. I would say the fifth term is 15+2^4 = 15 + 16 = 31.

function 2 has a greater rate of change than function 1

function 2 has a greater y-intercept than function 1

step-by-step explanation: