What is the graph of the piecewise-defined function f(x) ? f(x)= x+2 if x<−3 2x if −3≤x<3 x−2 if x≥3

Which of the following graphs represents the function f(x) = 2^x

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.