2. This graph represents the money earned by three people per item sold.
y.
1200
1000
800
(0,600)
600
C.
-400
b:
C:
400
200
a:
ii.
-200
-400
(400,800)
(0,0)
400
b
a. Find the equation of each line.
a
State how much
i.
(1600, 800)
1200 | 2000
b. Determine which graph corresponds to the following cases:
i.
A salary e.g. a fixed amount is paid per month
A piece work contract e.g. a fixed amount of money is paid for each piece sold
A commission contract with a low wage
The fixed salary is
2800
3600
ii. Is paid per item sold in the piece work contract
iii. The low wage and the commission
d. Explain why there can be a horizontal line but no vertical line.
EX