# Thread: Maching a function with a table of values.

1. ## Maching a function with a table of values.

Hi, I have another problem that has to do with functions.

48. Which data set is best described by the function y = –2x 2 + 5x?

F

G

H

J

2. Is that $\displaystyle y=-2x^{2}+5x$? You want to use the caret symbol ^ to indicate exponentiation. Or, you can use LaTeX like I just did.

In any case, the way to see which one fits is to start plugging in numbers. Take your x's, in the left-hand columns, plug them into your function, whatever that is, and see if you get the correct y values.

3. Originally Posted by Ackbeet
Is that $\displaystyle y=-2x^{2}+5x$? You want to use the caret symbol ^ to indicate exponentiation. Or, you can use LaTeX like I just did.

In any case, the way to see which one fits is to start plugging in numbers. Take your x's, in the left-hand columns, plug them into your function, whatever that is, and see if you get the correct y values.
Shoot, that was suppose to be a ^2. Copy and paste has failed me. :P Anyways, AH, ok. Thank you. Are you a tutor? You sure talk like one. Er, type I suppose. Thank you so much!

4. You're very welcome. And thank you for your kind words. I hope to be a math and physics teacher someday. And yes, I have done a very great deal of tutoring - that's my first love, really.