Graph function problem Incorrect values

Hello,

I have this function, If I want to produce a graph in the range of 0<x<50 it does not give a correct answer of y. Thanks for the helpers

x=1

y=-x.^3+3*x.^2+2*x-27

y =

   -23
   
   
   
   %%plot
   
   x=[0:50];

y=-x.^3+3*x.^2+2*x-27;

plot(x,y)
   
   

Answer 1

[Chunru]

What's wrong?

x=[0:50];
y=-x.^3+3*x.^2+2*x-27;
plot(x,y)

[Emilia]

See in the answer above if I set x=1 to be y=-23 but the graph doesn't show me that.

[Chunru]

The y axis scale is x10^4. If you zoom in, you will see the correct value.

[Emilia]

Yes, you're right, I didn't notice. Thank you! :)