The percentage of seniors who used marijuana in 2005 with the help of the appropriate line graph:
(b)
To determine
To calculate: The percentage of seniors who used marijuana in 2005 with the help of the mathematical model M=−0.3n+27. Also, determine whether it overestimate or underestimate the value displayed by the graph and by how much.
(c)
To determine
The percentage of seniors who used alcohol in 2005 with the help of the appropriate line graph:
(d)
To determine
To calculate: The percentage of seniors who used alcohol in 2005 with the help of the mathematical model A=−0.9n+69. Also, determine whether it overestimate or underestimate the value displayed by the graph and by how much.
(e)
To determine
In which year marijuana is used minimum by seniors from the period 1980 to 2009.
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