PartialMathematician

https://support.desmos.com/hc/en-us/articles/202532159-Regressions

Here is a graph:

https://www.desmos.com/calculator/0p4osddez0

- PM

D. Exponential decay.

When x increases, y decreases, and when x decreases, y increases. (Never reach 0)

Hope this helps,

- PM

The line, accoring to desmos, is \(y = 13.9061x + 191.333\), but you can just simplify it to \(y = 14x + 191\) or \(y = 14x + 191\dfrac{1}{3}\). 

Hope this helps,

- PM

in the graph above, fat is x, and calories is y. 

I am not sure whether "fat(g)" and "calories" are x or y. 

Here is a graph:

https://www.desmos.com/calculator/c3f0pxosbe

- PM

Haha, you guys are funny! 

Nice work, Guest! I counted the ones that didn't work to get my answer.