iheartfood
Which of the following functions shown in the table below could be an exponential function?



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iheartfood
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iheartfood
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A. f(x)
B. g(x)
C. h(x)
D. k(x)
**choose ALL that apply!! and pls explain :) thanks!

phi
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Exponential means you can find a common ratio between terms

iheartfood
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okay so f(x) is an answer right?? cuz its always +2 ?

iheartfood
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and g(x) doesn't have a common ratio...

iheartfood
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and neither does h(x) or k(x) right?? so is my only answer here A. f(x) ??? @phi :)

phi
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a ratio is the n+1 term divided by the nth term
a common difference like +2 means a linear function: it goes up by 2 at each term

iheartfood
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ohh okay then idk... :( can u pls show me?

iheartfood
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and we are looking for exponential function so f(x) is NOT an answer here then?

phi
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g looks like a common ratio of 0.7
0.7^x
h(x) looks like 1.6^(x+3)
k(x) looks like a parabola (it goes down, then back up)

iheartfood
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okay so my only answers are C. h(x) and D. k(x) ???
A and B don't work here?? C and D are my answers??

phi
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I believe so

iheartfood
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kk thanks!! :)

phi
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whoops, g and h not k

iheartfood
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ohhh okay haha so B. g(x) and C. h(x) are my answers? :)

iheartfood
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@phi :)

phi
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yes B and C

iheartfood
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kk thanks !!