The scatter plot drawn at the left depicts the

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7.The scatter plot drawn at the left depicts the percentage of Maryland residents born in Maryland between the years 1900 and 2000. Which of the following equations best describes the relationship shown?A.y=−0.3x+78.7B.y=3.3x−78.7C.y=−0.3x−78.7D.y=−3.3x+78.7
8.The scatterplot to the left shows the number of college students, n, in millions, who enrolled in atleast one online-course from 2002 to 2011, where trepresents years since 2002. A best fit line that approximates the data is also shown on the scatterplot. Which of the following is closest to the yearly increase in online college student enrollment from 2002 to 2011?
9.Mateus calculated his car's average fuel economy, y, in miles per gallon (mpg), for various speeds, x, in miles per hour (mph), and recorded his data, along with a best fit curve, on the scatter plot below.Based on the model, which of the following is a true statement?
10. The scatterplot to the left depicts the amount of copper, c, in metric tons, produced in the world from 1900 to 2010, where tis years since 1900. Which of the following best approximates the world copper production, in metric tons, in 1995?
1.The weight and fuel economy for various vehicles were measured and recorded in the scatterplot to the left. Given that wrepresents the weight of the vehicle, in thousands of pounds (lbs), and frepresents the fuel economy, in miles per gallon (mpg), which of the following equations best models the relationship between fand w?A.f=50−0.1wB.f=50−9.8wC.f=65.7−0.1wD.f=65.7−9.8w
2.Miles conducted an experiment to determine if there was a connection between a person's age and the person's typing rate. During the experiment, all subjects were asked to type the same essay. Their age, a, and typing rate r, in words per minute, were recorded in the scatterplot below.According to the experiment, which of the following equations best models the relationship between age and typing rate?
3.The scatterplot to the left shows the temperatures, y, in degrees Celcius (), of a cup of coffee cooling in a 22room at 5 minute intervals. If xrepresents the time, in minutes, since the coffeehad a temperature of 92, which of the following could be used to predict the temperature of thecoffee for 0≤x≤60?

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