# Making Linear Predictions?

**The number of city and county ordinances that restrict outdoor smoking has increased approximately linearly from 30 ordinances in 1999 to 1124 ordinances in 2007 (Source: American Nonsmoker's Rights Foundation).
Let y= the number of ordinances at x years since 1990
a.) Find an equation of a linear model to describe the data
b.) Use your equation to predict the year in which there will be 1500 such ordinances.
I am stuck this is what I have:
1999 -> 30 ordinances
2007->1124 ordinances
points x= years since 1990, y=amount of ordinances for that year
(9,30) & (17, 24)
M=y2 - y1/ x2-x1
slope: m= 24-30 / 17 - 9
= -6 / 8
**

TELL US , if you have any answer