Question

please help me I will reward!

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

none of these are exponential the way they are written but i will assume that they should be written such as for a. f(x)= 5^((4)-x)

Answer 2

I really dont know i cant determine what is exponent and what isnt

Answer 3

i just copied and pasted what was given but thank you for trying to help. I'm in algebra 1 if thats easier

Answer 4

could u take a screenshot?

Answer 5

I just got a new computer so i don't know how. Can I give you another problem instead?

Answer 6

ya sure just so you know you can solve the question you are given by plugging in 1 or 2 for x and making sure that you get either y=20 for x=1 or y=80 for x=2

Answer 7

and ya send the next question

Answer 8

The value of a rare painting has increased each year since it was found at a garage sale. The value of the painting is modeled by the function f(x) = 799(1.03)x. What does the 799 represent? What will the painting be worth after 5 years? Round your answer to the nearest dollar.

799 represents the value of the painting when it was found; the painting will be worth $926 after 5 years
799 represents the increase in the value of the painting; the painting will be worth $103 after 5 years
799 represents the value of the painting when it was found; the painting will be worth $804 after 5 years
799 represents the total value of the painting; the painting will be worth $926 after 5 years

Answer 9

799 represents the initial value of the painting

Answer 10

or the value of the painting when it was found

Answer 11

yeah, but which one? your answer isn't that specific

Answer 12

well I believe the way the 799(1.03)(x) has an exponent but I dont know where so I cant solve it

Answer 13

I believe the answer is A :)