PLEASE HELP: Tickets for the CTA train cost $0.75 for students and $1.25 for chaperones. If a school trip has a total of 50 people and everyone on the trip brings $1, how many students and chaperones are on the trip? *

HINT: Try graphing your equations or multiplying the cost equation by 4.

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Graph the equationy= x+3[tex]y = x + 3[/tex]

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