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ENGR 17 Practice Test 2 Name___________________ OPEN COMPUTER – OPEN NOTES 1) A) Use the fib.m function from a previous lab to plot fib(x) vs x, for x ranging from 1 to 20. You must use a loop to build the vector of fib numbers. B) Does this curve express a linear, exponential or power relationship? Justify your answer with an appropriate plot. C) Fit the curve with the appropriate mathematical formula (one of the above choices), solving for m and b. D) Determine the quality of your fit by calculating the r-squared value. E) Plot the curve and your model on the same plot, using appropriate symbols, axes and title labels. Also include a legend helping to identify model and data on the plot. 2) 3) Solve the following equations for x,y and z using Matlab - 1x + 3y - 5z = -48 5x + 2y - 3z = 26 2x = 104 - 8y + 4z 4) c. In each case determing whether a single solution exists, no solution, or an infinite number of solutions exist.