Final answer:
To find a quadratic model for the data, determine the independent and dependent variables, plot a scatter plot of the data, and analyze the vertex to find the maximum concentration and the time it is reached.
Step-by-step explanation:
a. In order to find a quadratic model for the data, we need to determine which variable should be the independent variable and which should be the dependent variable. Let's assume that time is the independent variable (x-axis) and concentration is the dependent variable (y-axis).
b. To find the maximum concentration, we need to analyze the vertex of the quadratic model. The vertex of a quadratic function represents the maximum or minimum point. Using the equation of the quadratic model, we can determine when the maximum concentration occurs by finding the x-coordinate of the vertex.
c. To draw a scatter plot, we plot the ordered pairs (time, concentration) on a coordinate grid. The scatter plot helps us visualize the relationship between time and concentration.