the temperature for the past 8 hours has been changing at the rate of-1.5 degrees each hour. the meteorologist predicts that the temperature will continue changing like this for the next 6 hours. the present reading is 0 degrees a. what was the temperature reading 7 hours ago? b. what temperature is predicted for 6 hours from now? c. when was the temperature reading 6 degrees? d. when is the temperature expected to be -8 degrees?

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: