The function f(x) is given by the set of ordered pairs. {(8, –3), (0, 4), (1, –5), (2, –1), (–6, 10)} which is true regarding the function? f(–3) = 8 f(3) = 5 f(8) = 0 f(–6) = 10

Choice D; f(-6) = 10

each (x,y) point tells us the relationship between the input x and the output y = f(x)

f(-3) = undefined since there is no point with x coordinate of -3

f(3) = undefined as well

f(8) = -3 based on the first point (8,-3)

These facts tell us that choices A, B, & C are all false. The only thing left is choice D which says f(-6) = 10. This is true since the point (-6,10) is in the function set.

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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