This language is MATLAB

2. Consider a discrete function given by the values in Table 1.

Table 1. A Discrete Function

Point i	1	2	3	4	5
x-value	1	2	3	4	5
y-value	-1	1	3	5	7

Recalling that for a linear fit the resulting equation should be of the form y=ax+b, find the linear curve fit using: a) The mathematical technique described in Lecture 23 b) The polyfit function

3. Consider the function b(x)=xx2+x3. Use the polyval function to evaluate b(x) at the point x=2, then print the results to the Command Window.

4. Consider the function c(x)=x45x2+4. Find the zeros of the function, then print the results to the Command Window.