plot function in matlab?

I want to plot qi=q0+3*(qf-q0)*t^2-2*(qf-q0)*t^3 as defined in the picture.i use plot or ez plot but the figure that is drawn is not correct.

q0=10(degree)

qf=-20(degree)

t=0 to 1 second

[KALYAN ACHARJYA]

Check the answer, I have edited. Pls confirm?

[Jan]

@Najmeh Eskandari: Please post your code and the output. Then explain what "not correct" means, such that we can give you an advice how to improve your code.

Answer 1

[KALYAN ACHARJYA]

q_o=10;
qf=-20;
t=0:.1:1;
qi=q_o+3*(qf-q_o)*t.^2-2*(qf-q_o)*t.^3; 
plot(t,qi);
title('Cubic Polynomial Trajectory');
xlabel('Time(sec)'); ylabel('Angle(deg)');

[KALYAN ACHARJYA]

Confirm?