Question

miles traveled by air passengers in country x, 1960 to 2005
number of miles traveled (billions)
year
according to the line of best fit in the scatterplot above, which of the following best approximates the year in which the number of miles traveled by air passengers in country x was estimated to be 550 billion?
a) 1997
b) 2000
c) 2003
d) 2008

Explanation:

Step1: Locate 550 billion on y - axis

Find the 550 - billion mark on the vertical axis representing the number of miles traveled.

Step2: Draw a horizontal line

Draw a horizontal line from the 550 - billion mark on the y - axis until it intersects the line of best fit.

Step3: Draw a vertical line

From the intersection point on the line of best fit, draw a vertical line down to the x - axis representing the year.

Step4: Estimate the year

The vertical line intersects the x - axis close to the year 2003.

Answer:

C. 2003