5)

skrypt
x1 = [0:0.0001:10];
x2 = [0:0.0001:2*pi];
y1 = 3*x1+10;
y2 = sin(x2);
y3 = x1.^2-3*x1+1;

a = f1(y1,x1);
b = f1(y2,x2);
c = f1(y3,x1);
a
b
c

funkcja

function[y] = f1(f,x)

y = 0;

for i = 2:length(x)
    y = y + ( (f(i)+f(i-1))*(x(i)-x(i-1)))/2;
end


end