Posted by **Anonymous** on Thursday, May 27, 2010 at 5:10pm.

The total sales made by a salesperson was $25,000 after 3 months and $68,000 after 23 months. Predict the total sales after 42 months.

- math -
**Reiny**, Thursday, May 27, 2010 at 6:11pm
Are we assuming that the relation is linear ?

Then treat the data as two ordered pairs

(3,25000) and (23,68000)

slope = (68000-25000)/(23-3) = 43000/20 = 2150

using the y=mx+b equation for a straight line

sales = 2150month + b

sub in 3,25000)

25000 = 2150(3) + b

b = 18550

sales = 2150month +18550

so if month = 24

sales = ......

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