Error in line 53 when using linear interpolation

I have been asked to solve this question but cannot go further as MATLAB is giving me an error.

Body temperature

During one minute the body temperature of a subject performing a physical task was measured every 10 seconds. The results are listed in the table.

P 3.2

 Assign the time values to a row matrix t and the measured temperatures to row matrix T.

•  Determine the body temperature at t =15s using linear interpolation.
•  Repeat the procedure, now using a third-degree polynomial for theinterpolation.

I am confused because the answer key is saying to use this method.

Please help if you can!

Answer 1

[Torsten]

The name of the interpolation function is "interp1", not "interpl".

[Roos]

Oh wow thank you, the textbook's "1" looks awfully a lot like an "l" haha. Thank you so much