Question

Which function is an example of exponential growth?

y= 2(0.3)x
y= 1.5(0.4)x
y= 3(8)x
y= 2(0.7)x

Answer 1

y = 3(8)^x

Answer 2

Thanks~!

Answer 3

basically you're looking for expressions where the base is larger than 1

that only happens with y = 3(8)^x, since the base is 8 (and 8 > 1)

the other bases of 0.3, 0.4, 0.7 are all smaller than 1, so they represent exponential decay and not growth