The relationship actually looks like a line, not a curve.
Y=β0+β1X+ϵcap Y equals beta sub 0 plus beta sub 1 cap X plus epsilon β0beta sub 0 (Intercept): Sales when the temperature is 0 degrees. β1beta sub 1 Regression Analysis by Example
For a regression to be reliable, your data must pass the "sniff test": The relationship actually looks like a line, not a curve
(Slope): For every 1-degree increase in temperature, how many more coffees do you sell? Regression Analysis by Example
Regression isn't just about the past; it’s about the . With a solid model, you can check tomorrow's weather forecast and know exactly how much milk to order.