Each ordered pair gives the exposure index x of a carcinogenic substance and the cancer mortality $y$ per 100,000 people in the population. Use the model $y = 9.2 x + 108.4$ to approximate $y$ if $x = 7$. Round your answer to one decimal place.
$$\begin{array} { l }
( 3.50,150.1 ) , ( 3.58,133.1 ) , ( 4.42,132.9 ) , ( 2.26,116.7 ) , ( 2.36,140.7 ) , ( 4.85,165.5 ) \
( 12.65,210.7 ) , ( 7.42,181.0 ) , ( 9.35,213.4 )
\end{array}$$
A) $168.2$
B) $163.6$
C) $182.0$
D) $172.8$
E) $177.4$

Question

Each ordered pair gives the exposure index x of a carcinogenic substance and the cancer mortality $y$ per 100,000 people in the population. Use the model $y = 9.2 x + 108.4$ to approximate $y$ if $x = 7$. Round your answer to one decimal place.
$$\begin{array} { l } 
( 3.50,150.1 ) , ( 3.58,133.1 ) , ( 4.42,132.9 ) , ( 2.26,116.7 ) , ( 2.36,140.7 ) , ( 4.85,165.5 ) \
( 12.65,210.7 ) , ( 7.42,181.0 ) , ( 9.35,213.4 )
\end{array}$$
A) $168.2$
B) $163.6$
C) $182.0$
D) $172.8$
E) $177.4$

Quizplus · Accepted Answer

Substitute the value of $x = 7$ into the equation given to find $y$.
$$y = 9.2(7) + 108.4 = 172.8$$
Round to one decimal place. Therefore, the answer is D) 172.8.

Each Ordered Pair Gives the Exposure Index X of a Carcinogenic