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Why isn't my first line being plotted?

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On this quiz, I have to graph two lines and only f1 is showing up on my graph. The first graph is supposed to have 100 points between the values of zero and ten. As of right now, the fplot is working fine, but the regular one isn't. Does anyone see anything that is prevent the regular plot from being plotted?
x=0:100:10;
y=10*exp(-0.5*x)*cos(6*x);
plot(x,y,'r')
f1=@(x) 20*exp(-0.5*x)*cos(6*x);
hold on
plot(x,y,'r')
fplot (f1,[0,10],'g')
xlabel('x axis')
ylabel('y axis')
hold off

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Accepted Answer

Stephen Cobeldick
Stephen Cobeldick on 31 Jan 2020
Edited: Stephen Cobeldick on 31 Jan 2020
"Does anyone see anything that is prevent the regular plot from being plotted?"
Here are two bugs on the first two lines:
x=0:100:10; % start:step:end -> how many points are there between 0 and 10 with step of 100?
y=10*exp(-0.5*x)*cos(6*x); % you used MTIMES but you should use TIMES.
To use MATLAB you need to know the difference between array and matrix operations:

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