#### Answer

The independent variable is number of tickets.
The dependent variable is number of biscuits.
The graph is attached below.
The equation for the table is y=23-3x
The relationship is that for every trick performed, 3 biscuits are used and so the number of biscuits decreases by 3. It can be deduced that before any tricks were performed, there were 23 biscuits to start with.

#### Work Step by Step

The equation for the table is y=23-3x.
The slope is -3 because for every trick performed i.e. an increase in independent variable, 3 biscuits are used and so the number of biscuits decreases by 3. Thus the slope is -3.
Also, the y-int is 23 because when 1 trick is performed, there are 20 biscuits. So if 0 tricks are performed, there must be 23 biscuits.