Question

Which equation represents an exponential function that passes through the point (2, 80)?

f(x) = 4(x)5
f(x) = 5(x)4
f(x) = 4(5)x
f(x) = 5(4)x

Answer 1

replace \(x\) by \(2\) and see which one gives \(80\)

Answer 2

so the last one?