Research participants drank either caffeinated or decaffeinated beverages in a study of the effects of caffeine on anxiety levels. those who received the caffeinated drinks were assigned to the group.

Experimental group

Step-by-step explanation:

In a  psychology experiment, the test gathering (or trial condition) alludes to the gathering of members who are presented to the free factor. These members get or are presented to the treatment variable.  

The free factor is changed in the exploratory gathering.

For example : A human test gathering could get another prescription, an alternate type of advising, or some nutrient enhancements

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8