The graph represents the data cost for monthly internet
service for a cell phone.
which function, c(x), represents the monthly cost in
dollars in terms of x, the number of gigabytes used in a
month?
cell phone internet service

How many solutions does the nonlinear system of equations graphed bellow have?

What is the inverse of the function f(x) = 2x + 1?

Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias