The equation of the linear regression line represents the relationship between the number of cars washed for charity, x, and the amount earned for the charity, y. yˆ=10x+20 what does the slope of the line represent? for every car washed for charity, the amount earned for the charity increases by $10. for every car washed for charity, the amount earned for the charity increases by $20. for every car washed for charity, the amount earned for the charity increases by $1. for every car washed for charity, the amount earned for the charity increases by $2.

Really need on these. i have no idea what to do

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?

Which expression is equivalent to -5(3x - 6/7)