Check the functions whose inverses are also functions. On a coordinate plane, an absolute value function opens down.

On a coordinate plane, an exponential functions increases from quadrant 2 into quadrant 1.

On a coordinate plane, a cubic function has an x-intercept of (0, 0).

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.