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anonymous

  • one year ago

Need Help please, Medal + Fan: Which equation represents an exponential function that passes through the point (2, 80)? f(x) = 4(x)5 f(x) = 5(x)4 f(x) = 4(5)x f(x) = 5(4)x

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  1. mathstudent55
    • one year ago
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    Test the point in each equation and see which one works.

  2. anonymous
    • one year ago
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    How? could you explain please

  3. mathstudent55
    • one year ago
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    Also, an exponential function has the form \(\large f(x) = ab^x\) This alone will allow you to eliminate two answers.

  4. mathstudent55
    • one year ago
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    An exponential function has x as an exponent. What can you conclude about the first two choices?

  5. anonymous
    • one year ago
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    A and B cannot be correct

  6. mathstudent55
    • one year ago
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    Good. Now let's look at C and D.

  7. anonymous
    • one year ago
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    Okay..

  8. mathstudent55
    • one year ago
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    Choice C Is this true? \(80 = 4 \cdot 5^2\) Choice D Or is this true? \(80 = 5 \cdot 4^2\)

  9. anonymous
    • one year ago
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    D

  10. anonymous
    • one year ago
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    16x5=80

  11. anonymous
    • one year ago
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    Thank you

  12. mathstudent55
    • one year ago
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    Correct.

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