PLS HELP QUICKLYY Ivy has purchased 150 songs from the internet. She plans to download an equal number of songs each week for 5 weeks. The graph show the number of songs left to download, y, for a certain amount of weeks, x.
Part A: What is the rate of change represented by the graph? What does the rate of change represent in this situation? Show or explain how you found this. (3 points)

(there is photo, witch is the graph)

I already know the initial value and rate of change, the only question I don't know is
"What does the rate of change represent in this situation?"

So pls help quickly! It is due today!

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?