MATLAB: How do you graph this function

Question

How do I graph (x,y) for the following information:

x[1]=10

x[2]=20

x[3]=30

x[4]=40

x[5]=50

x[6]=60

and so on

and

y[n]=(x[n]+x[n-1])*1/2

y[1]=(10+0)*1/2=5

y[2]=(20+10)*1/2=15

Answer 1

solution:

n=10;
x=10:n:60;
y=(x+(x-n))*1/2;
figure;
plot(x,y,'r*-')