To find the slope between the two points, you can use the slope formula:
slope = (y2 - y1) / (x2 - x1)
In this case, the coordinates of the two points are:
Point 1: (1997, 1.26)
Point 2: (2006, 2.31)
Now let's substitute the values into the formula:
slope = (2.31 - 1.26) / (2006 - 1997)
Simplifying this:
slope = 1.05 / 9
Therefore, the slope between the two points is approximately 0.1167, or rounded to three decimal places.
To explain how I arrived at this answer, I used the formula for finding the slope of a line. By subtracting the y-values of the two points (2.31 - 1.26) and dividing it by the difference in the x-values (2006 - 1997), I obtained the slope.