Rashad and Kendra were walking through the park and noticed several hummingbirds on a tree with yellow flowers. They wanted to know if the color yellow attracts hummingbirds more than other colors. Rashad and Kendra decided to test their hypothesis by doing an experiment in which they set up four hummingbird feeders with the same amount of food and placed them in locations only hummingbirds could reach. One feeder was yellow, one was red, one was blue, and one was clear. Each day for one week, Rashad and Kendra measured and recorded the amount of food left in each of the feeders. At the end of the experiment the red feeder had the least amount of food left in it. What conclusion should Rashad and Kendra reach?

Yellow does not attract hummingbirds.

Explanation:

The most food wasn't taken out of the yellow feeders.

The results failed to support the hypothesis that hummingbirds are most attracted to the color yellow.

Explanation:Cause i got it right

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).