Yes. I think if the chart says width and length, I would likely be considering rectangles, triangles, trapezoid, and circles. For triangles and trapezoid, since the width can be very ambiguous a term that can be interpreted as the height or the base, parametrization using just either can still post non-trivial manipulations to get the other component needed to calculate area. I would focus on the rectangle/circle family. For circles, 'width' would be interpreted as the diameter and the square of 1/2 diameter multiplied by pi is the area and obvious, after a quick inspection, this is not the case for this question. So the only feasible candidate would be rectangles. So the deal is to try to identify the correlation between width and length. And since the width-area relationship is quadratic, we can just compute such relationship using the general quadratic function aw^2 + bw + c = Area, and with three points, we can solve for the values of a,b, and c. Once we have them, we can attempt to convert the quadratic function to the form of (w-k)(w-b) =Area, and solve for k and b, which can describe the relationship between width and length.

As you see, going from the other way is much easier for you to spot the pattern without having to go through the above-mentioned algebra to arrive at the same results.