Question

I WILL GIVE MEDAL
Which of the following exponential functions goes through the points (1, 20) and (2, 80)?

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

Answer 1

I think its the second one im not sure though

Answer 2

It' D

Answer 3

Can you show me why you think its D?

Answer 4

hes right

Answer 5

f(x)=4(5)x
f(2)=4(52)=4(25)=100

f(x)=5(4)x
f(2)=5(4)2=5(16)=80

Answer 6

D was incorrect

Answer 7

Sorry C

Answer 8

Thanks anyways im fixing to close though.

Answer 9

Type the wrong thing

Answer 10

No I didnt because I copied and paste'd it but it came out wrong because I should have added the exponent symbol. Thanks though

Answer 11

No problem