Consider the following scatter plot of amounts of CO carbon

Consider the following scatter plot of amounts of CO (carbon monoxide) and NOX (nitrogen oxide) in grams per mile driven, in the exhausts of cars. The least squares regression line has been drawn in the plot. The intercept of the least squares regression line is approximately Referring to scatterplot above, the least squares line would predict that a ear which emits 10 grams of CO per mile driven would emit how many grams of NOX per mile driven?

Solution

2.1) From the Scatterplot it is clear that the line cuts the NOX axis at approximately 1.7

So option b) is correct

2.2) Ifd we draw a line parallel to NOX axis at CO=10, which cuts the least square line at some point and then from that point draw a line parallel to CO axis, It will cut the NOX line at 1.1.

Hence option d) is correct