I need help with MATLAB homework

Let x denote the distance of a planet from the Sun measured in millions of kilometers and y denote the period for a planet to orbit the Sun measured in days. The data for nine planets in the solar system is given in the table: (a) For the given set of data find the least-squares curve f(x)=CxA, where A and C are constants. (Hint: use transformation) (b) Do your results agree with Kepler's third law of planetary motion? (c) Plot the resulting least squares curve over the interval [0,6000]. In the same plot show the data points with markers. 3 (d) Now, assume that a new planet Xeta is detected in the solar system. If it orbits the Sun in 105 days, then what is the prediction of your model for the distance of planet Xeta from the Sun