How do I plot first order function? New to Matlab

Hi! New to Matlab so I have no knowledge. I have some knowledge in C++ and Java and C.

I want to plot the function y=3x+2 So I guess I have to declare 2 variables x and y and plot y for a range of values of x. How do I do this? I am running Matlab2015a-SP1

Answer 1

[Azzi Abdelmalek]

x=0:0.01:20
y=3*x+2
plot(x,y)

Or use fplot

y=@(x) 3*x+2;
range=[0 20];
fplot(@(x) y(x),range)

[Alexandros]

What is the fplot?

[Azzi Abdelmalek]

http://www.mathworks.com/help/matlab/ref/fplot.html