A full lake begins dropping at a constant rate. After 4 weeks it has dropped 3 feet. What is the unit rate of change in the lake's level compared to it's full level?

choices: (a) 0.75 (b) 1.33 (c) -0.75 (d) -1.3

Respuesta :

(-3 ft)/(4 weeks) = -3/4 ft/wk = -0.75 ft/wk

The most approriate choice is ...

... (c) -0.75