Lead Concentration Because of past use of leaded gasoline, the concentration of lead...

Lead Concentration Because of past use of leaded gasoline, the concentration of lead in soil can be associated with how close the soil is to a heavily traveled road. The table

shows average lead concentrations in parts per million of samples taken from different distances from roads.

a. Find a log model for these data.

b. An apartment complex has a dirt play area located 12 meters from a road. Calculate the lead concentration in the soil of the play area.

c. Find an exponential model for the data. Compare this model to the log model found in part a. Which of the two models better displays the end behavior suggested by the context?