Please select the appropriate answer for all 5 questions and then click the submit exam for grading button at the end of the page.

Question 1. What is a function? (a) A mathematical expression between two variables x and y (b) Any mathematical expression (c) A relation between variables x and y that yields a single value of y for each value of x. (d) A complex formula between two variables x and y.

Question 2. What is a linear function? (a) A polynomial function of any degree (b) A polynomial function of degree 1 (c) A function that can be easily graphed (d) None of the above

Question 3. Find (f . g)(x) if f(x)= x+1 and g(x) = x-1 (a) x2+1 (b) x2-1 (c) 2x (d) x2 + x + 1

Question 4. Find (f - g)(x) if f(x)= x3+x and g(x)= x2 +1 (a) x3+x2+x+1 (b) x3-x2+x+1 (c) x3-x2+x-1 (d) x3-1

Question 5. Find the degree of the function x5+x3+x (a) 5 (b) 3 (c) 1 (d) 9