Nightmare111
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Please help! I'd be very, very grateful, the best response will get brainiest! -Nightmare

Function f is an exponential function. It predicts the value of a trading card, in hundreds of dollars, as a function of the number of decades since it was last purchased. What equation models this function?

Enter your answer in the box. f(x)=

Please help Id be very very grateful the best response will get brainiest Nightmare Function f is an exponential function It predicts the value of a trading car class=

Respuesta :

wegnerkolmp2741o

Answer:

y = 4 * (7/4) ^x

Step-by-step explanation:

y = ab^x  is the general form of an exponential function

where a is the initial value and b is the growth rate

We know 2 points, (0,4) or the initial value and (1,7)

a =4

y = 4 b^x

7 = 4 b^1

We can solve for b

Divide by 4

7/4 = b

y = 4 * (7/4) ^x