Question: My code isn't working for DEplot


Use DEplot to sketch a direction field for my_deq and the solution curve for the initial condition T(0) = 88 C. Assign your plot to my_plot.

*Note: my_deq is the differential equation 


My input:


ODE2:=(Diff(T(t), t) = 1/59*(18-T(t)));

DEplot( ODE2, T(t), t=-4..4, {[T(0)=88]}, y=0..100);


Error Received: 

Error, (in DEtools/DEplot/CheckInitial) the 'number' option must be specified before initial conditions


The only thing I can find about this error is the input isn't in the form of a differential equation... But I'm pretty sure it is.


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