Question

The analysis of a data set last year produced a line of best fit with equation y = 2.108x - 0.3818. Data was collected from the same sample this year and produced a line of best fit with equation y= 2.107x + 1.7455. Explain the verticalchange in going from last year's data to this year's data.

Answer 1

The slope of the line has increased, meaning it has become a positive number. This shift means that this year the data points were placed higher than the previous year.