Select the correct statement about the function represented by the table.

a. it is a linear function because the difference y-x for each row is constant.
b. it is an exponential function because the y-values increase by an equal factor over equal intervals of x-values.
c. it is an exponential function because the factor between each x- and y- value is constant.
d. it is a linear function because the y-values increase by an equal difference over equal intervals of x-values.

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?