Question

Modeling Review Lead was banned as an ingredient in most paints in 1978, although it is still used in specialty paints. Lead usage in paints from 1940 through 1980 is reported in the accompanying table. Year 1940 1950 1960 1970 1930 Lead usage (thousands of tons) 70 35 10 0.01 (a) Align the input data as years after 1940. Examine a scatter plot of the data. Find quadratic and exponential models for lead usage. (Round your coefficients to 3 decimal places.) Quadratic Model Q(x)-ו0.0572x2 225.76x i 2229 19 | Х thousands of tons of lead was used in paints x years after 1940, for the years from 1940 through 1980. Exponential Model ESE 167e 0.19Tx x thousands of tons of lead was used in paints x years after 1940, for the years from 1940 through 1980. Elx)

Answer 1