Solve.

The total sales made by a salesperson were $25,000 after 3, months and $68000 after 23 months. Predict the total sales after 42 months.
25000=3months
68000=23 months
x=42 months

how do I do this?

2 answers

Plot coordinate points on an x y grid and/or use a graphing calculator. The months are your x's and the dollars in sales are your y's.
ok once I have the plots do I use the formula
m=y2-y1/x2-x1
and then what?