Determine the range of the function. y = -2x2 + 3
A) all real numbers
B) all integers less than or equal to 3
C) all integers greater than or equal to 3
D) all real numbers less than or equal to 3

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: