after browsing through a lot of question already posted here and not getting anywhere, I'm posting my problem now too. I have measured growth rates over a range of temperatures (temperature response curve) and would like to fit an already established equation/model to it. I'm very new to R and have trouble coding it right.

This is my data:

    x <- c(37.8,
   34.8,
   32.25,
   29.65,
   26.75,
   24.4,
   21.45,
   19.15,
   16.2,
   13.7,
   10.95,
   8.2,
   5.4)
    y <- c(0.0381,
   0.018133333,
   1.057033333,
   2.3395,
   2.5188,
   2.6132,
   2.398466667,
   2.082966667,
   1.687366667,
   1.389233333,
   0.9835,
   0.639833333,
   0.3757)

The equation I'm trying to fit is as follows:

y=(3.5-x/10)*(x/25)exp(5/2)

I tried modifing code that I found here to my equation but have been unsuccessful so far. Can someone help with this with a step by step guide for dummies?