Posted by **jess** on Monday, March 9, 2009 at 7:11pm.

The equation y = a^x is a decreasing function a =

1) 1

2) 2

3) -3

4) .25

I think that the correct answer is 3) -3...but I am not sure why? Can anyone please check if I am right and explain why? Please....Thank you for your help!!!

- Math (Check) -
**Reiny**, Monday, March 9, 2009 at 7:31pm
In y = ax^2 , the parabola opens upwards for a positive value of a

and it opens downwards for a negative value of a

so have confidence in your answer since ...

- Math (Check) -
**jess**, Monday, March 9, 2009 at 7:35pm
Thanks for your help!!! :)

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