I have a 4 part problem that I am unsure what is being asked. I have shown what i have worked out.

a) Find the differential of y

b) Calculate dy when x=4 and delta x = 0.01.Interpret.

c) Calculate delta y when x =4 and delta x = 0.01.Interpret.

d)Illustratedy and delta y.Interpret.

So what are they asking for "interpret" and "illustrate"?

Thanks,

Rod