clc
clear all
close all
x = 0:.01:5;
y = sqrt(x);
figure
hold on
grid on
xlabel('x')
ylabel('y')
plot(x, y, 'b')
T0 = @(x) 1 + 0*x;
fplot(T0, [0 5], 'r')
T1 = @(x) 1/2 + 1/2*x;
fplot(T1, [0 5], 'g')
T2 = @(x) 1/2 + 1/2*x - 1/8*(x - 1).^2;
fplot(T2, [0 5], 'm')