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3 years ago

HELP PLEASE!

Mathematics

1 answer:

zheka24 [161]3 years ago

6 0

Answer: y = 5*(7/5)^x
Note: In decimal form, the equation is y = 5*(1.4)^x because 7/5 = 1.4

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Explanation:

The general exponential form is y = a*b^x
Plug in the first point (x,y) = (0,5) and we can find 'a' to be...
y = a*b^x
5 = a*b^0
5 = a*1
5 = a
a = 5

Which means y = a*b^x updates to y = 5*b^x
Now plug in the other point (x,y) = (1,7) to find b
y = 5*b^x
7 = 5*b^1
7 = 5*b
b = 7/5
b = 1.4

So the equation is y = 5*(7/5)^x which is equivalent to y = 5*(1.4)^x

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