Algebra 1

Which type of function best models the data in each table? Write an equation to model the data.
Table:
x | y
0 | 5
1 | 2
2 | 0.8
3 | 0.32
4 | 0.128
Please help me out with this I would really appreciate it! If someone could explain to me how to do this type of problem because I have more like it. Thank you.

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  1. note that each y is 0.4 times the previous one. So,
    y = 5*0.4^x

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  2. Thank you so much! and do you know what function it is? I know its not linear.

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  3. It's called exponential.
    Surely your text explains all this, or it would not be asking about it.

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  4. Thank you, and no this is makeup work for me to do over spring break because I was sick when they went over this in class. Thanks again.

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