Unit test, part 2: systems of equations
answer the questions below. when you are finished, submit this test to your teacher for full credit.
total score:
of 48points
(score for question 1: __ of 16 points)
1. what is the solution to the system of equations?
3x - y = -12
x – 2y = 10
(a) use the substitution method to justify that the given system of equations has no solution
(b) what do you know about the two lines in this system of equations?

The equation shown below represents function f. f(x)= -2x+5 the graph shown below represents function g. which of the following statements is true? a. over the interval [2, 4], the average rate of change of f is the same as the average rate of change of g. the y-intercept of function f is less than the y-intercept of function g. b. over the interval [2, 4], the average rate of change of f is greater than the average rate of change of g. the y-intercept of function f is greater than the y-intercept of function g. c. over the interval [2, 4], the average rate of change of f is the same as the average rate of change of g. the y-intercept of function f is greater than the y-intercept of function g. d. over the interval [2, 4], the average rate of change of f is less than the average rate of change of g. the y-intercept of function f is the same as the y-intercept of function g.