Marissa researched the cost to have custom t-shirts printed by several local and online vendors. she found that each store’s charge for the job could be modeled by a linear function that combined a flat charge for artwork with a per t-shirt rate. marissa plotted the functions on a coordinate grid and found that two of the functions produced lines that had the same y-intercept. how should marissa interpret this result?

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?