The filled table of data is :
__x __ y
__0 __45
__ 1 __40
__ 2__35
The number of cookies gotten per trip is 5 and Mac will make 9 trips before card is empty.
From the graph, we can deduce the following pair of points :
(0, 45)
(1, 40)
(2, 35)
The filled table is :
__x __ y
__0 __45
__ 1 __40
__ 2__35
The number of cookies mark gets per trip :
y = kx
Using the slope
- Change in y / change in x
(40 - 45) / (1 - 0)
= -5
Hence, Mac gets 5 cookies per trip
3.)
Number of trips before card is empty :
When card is empty ; y = 0
y = -5x + 45
0 = -5x + 45
5x = 45
x = 9
Hence, Mac will make 9 trips