-A difference quotient is used to calculate the slope of the secant at a general point.

_____16. The instantaneous rate of change is determined by finding the difference quotient over a very small interval.

_____17. A limit exists if both the right-hand and left-hand limits are equal.

_____18. A jump discontinuity occurs when a function jumps over the x-axis.

_____19. An infinite discontinuity means a function is merely a set of scattered points.

_____20. A vertical asymptote can be found by solving the numerator equal to zero in a rational function.

_____21. A piecewise function always has a jump discontinuity.

_____22. Functions that have an indeterminate form when evaluating a limit can always be simplified by factoring.