Corey used the regression equation y = 1.505x − 88.21, where x is the temperature and y is the number of swimmers, to determine a possible outside temperature when 80 swimmers are at City Pool.
1. y = 1.505(80) − 88.21
2. y = 120.4 − 88.21
3. y = 32.19
4. If there are 80 swimmers at the pool, the temperature is likely to be 32.2°F.
Analyze Corey’s work to find his error. What is Corey’s mistake?
