Transcript A new copying machine can do a certain job in 1 hour less

A new copying machine can do
a certain job in 1 hour less than
an older copier. Together they
can do the job in 72 minutes.
How long would it take the older
copier by itself to do the job?
Building Linear Functions
From Data
January 24, 2007
Scatter diagrams
25
16
20
14
15
12
10
10
8
5
2
3
4
5
3
4
5
Mortgage Qualification
Annual Income
Loan Amount
15,000
44,600
20,000
59,500
25,000
74,500
30,000
89,400
35,000
104,300
40,000
119,200
45,000
134,100
50,000
149,000
55,000
163,900
50,000
178,800
65,000
193,700
70,000
208,600