fzero is not for plotting. It finds the zero crossing at an initial guess. This will get you started. Look at legend() and title() commands.
y1=@(x)exp(x);
y2=@(x)8*x-4;
x=-2:.01:5;
a=fzero(@(x)y1(x)-y2(x),.5);%finds intersection of the curves near .5
b=fzero(@(x)y1(x)-y2(x),3);%finds intersection of the curves near 3
plot(x,y1(x),x,y2(x),a,y1(a),'*',b,y1(b),'*');
