Posted by **lee** on Wednesday, November 14, 2012 at 11:47am.

3. Find a model for the set of values.

x –5 –4 0 4 5

y 25 16 2 16 25

Can someone explain what the graph might look like whether it opens up or down, or slanted line or squiggle line

- algebra -
**Steve**, Wednesday, November 14, 2012 at 11:58am
looks symmetric about x=0, and opens up.

In fact, it looks a **lot** like y = x^2!

- algebra -
**Steve**, Wednesday, November 14, 2012 at 11:59am
with a bump at x=0

- algebra -
**Steve**, Wednesday, November 14, 2012 at 12:06pm
using Newton's divided differences, you can see that

.005*x^4 + .795*x^2 + 2

matches the data points

- algebra -
**lee**, Wednesday, November 14, 2012 at 1:00pm
I thought the graph looks like it opens up with the bottom on 2

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