Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. The table gives the boiling point of water at different altitudes.

Altitude (1,000 feet)Boiling Point of Water (°F)
0212.0
0.5211.1
1.0210.2
2.0208.4
2.5207.5
3.0206.6
4.0204.8
4.5203.9
Based on the table, the linear equation that represents the change in water’s boiling point for every 1,000-foot change in altitude has a slope of
units.