<p>(Not sure if I’m correct, but this is how I would do it)</p>
<p>The straight line going through the points is basically a rough average of all the prices per pound. So the slope of this line should give me a number close to the actual average without having to work all the numbers out.</p>
<p>When x = 4, y = 3. So this tells me that 3/4 should be the average… 3/4 = .75
the closest answer is .73</p>
<p>However I have no clue if I’m right :D</p>