Question

bell ringer - graphing

amount of nitrogen in water, ppm
nitrogen in water, ppm: 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35
distance from sewage treatment plant, kilometers: 0, 0.2, 0.4, 0.6, 0.8, 1, 1.2, 1.4

what is the independent variable?

○ distance from sewage plant
○ amount of nitrogen in water
○ date and time
○ velocity of sewage

Explanation:

In a graph, the independent variable is plotted on the x - axis. Here, the x - axis represents "Distance from sewage treatment plant, kilometers", and the y - axis represents the dependent variable (amount of nitrogen in water, as it depends on the distance). The other options (date and time, velocity of sewage) are not represented on the graph, and "amount of nitrogen in water" is the dependent variable. So the independent variable is the distance from the sewage plant.

Answer:

A. distance from sewage plant