The first step is to calculate the slope of the line from the graph. The formula for calculating slope is expressed as
slope = (y2 - y1)/(x2 - x1)
where
y2 and y1 are the y cordinates of selected final and initial points on the line
x2 and x1 are the x cordinates of the selected final and initial points on the line
By selecting final and initial points on the line, we have
when x1 = 1, y1 = 2
when x2 = 2, y2 = 4
By substituting these values into the formula, we have
slope = (4 - 2)/(2 - 1) = 2/1 = 2
Thus, the unit rate is 2
The answer is
2 cookies/$1
