Straight line plots

Matlab program to plot Straight line
y = mx  and y = mx + c.
where m is slope (or gradient) and c is y intercept of  straight line.

Matlab code:

clc;         % Clear all input and output 

clear all; % Clear all variables 

close all; % Close all figures.

x=[1 4 13 -4 -1];

m=1;

c=0;

y=m*x+c;

subplot(1,2,1);  

plot(x,y);   % Graph 2-D data with linear scales for both axes

axis([-10 20 -10 20]);

title('y=m*x');

xlabel('x-->');

ylabel('y-->');

grid;

c=5;

y1=-m*x+c;

subplot(1,2,2);

plot(x,y1);      

axis([-10 20 -10 20]);

title('y=-m*x+c');

xlabel('x-->');

ylabel('y-->');

grid;

Figure window