This question is pertaining to Linear Functions

Question

1) An equation for a linear model, based on data from 1912-2012 (where x represents the year), is

 

                                                                          y= -0.0167x + 46.45

 

Determine the slope. What does the slope of this line represent? Why is the slope negative?

Answer 1

The equation is in slope-intercept form:

y = mx + b

The slope is -0.0167

The slope represents the amount of change in y for every unit of change in x

The slope is negative to represents a decline.