To determine which fertilizer will help Omar's plant reach 2 feet of growth the fastest, he would need to compare the rates of growth of the two fertilizers as modeled by the linear equations. The key attribute to focus on for this comparison is the slope of the linear growth model, which indicates the rate of growth per week.
However, since the options provided seem to focus on specific attributes, the most relevant choice would be to compare the ranges of growth over time rather than minimums, maximums, or domains. The correct response in this context, although not perfectly phrased and dependent on how the context is interpreted, would be along the lines of comparing how quickly each fertilizer reaches 2 feet based on expected growths.
Since none of the given responses explicitly mention the rates of growth (slope), it would be most reasonable to choose the attribute associated with the growth reaching 2 feet over time from the ranges provided.
Therefore, the best option available would be: "Omar would need to compare the ranges from (0,0) to (2,y)."
This option implies comparing how quickly each fertilizer model achieves the goal of reaching 2 feet of growth, albeit indirectly by evaluating ranges.