A biologist would like to know how the age of a mother affects the incidence of Down syndrome. The following data represent the age of the mother and the incidence of Down syndrome per 1000 pregnancies. Draw a scatter plot treating age of the mother as the independent variable. Would it make sense to find the line of best fit for these data? Why or why not?

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Age of Mother, x 33 34 35 36 37 38 39 40 41 42 43 44 45 Incidence of Down Syndrome, y 2.4 3.1 4 5 6.7 8.3 10 13.3 16.7 22.2 28.6 33.3 50