Which of the sets of ordered pairs represents a function? A = {(1, -2), (3, -5), (5,2), (7,5)}
B = {(4,2), (4, -2), (9,3), (9, -3)} Only A Only B Both A and B Neither A not B

what's the question?

step-by-step explanation:

there is no question.

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation:

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)