Which statements are true about exponential decay functions check all that apply
1 the domain is all real numbers
2 as the input increases, the output increases
3 the graph is the same as that of an exponential growth function
4 the base must be less than 1 and greater than 0
5 the function has a constant multiplicative rate of change

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