If the tip varies directly with the number of guests, which equation represents the relationship between the tip, t, and the number of guests, g? t = 1.8g t = g/18 g = 1.8t g = t/18

If the tip, t, varies directly with the number of guests, g, then it means that any change in tip there is a corresponding change in the number of guests. When the tip increases the number of guests increases as well. Therefore,

t α g

To change the it to equal sign, we incorporate a proportionality constant, k.

t = kg

This equation will represent the relation of t to g