Fast food is often considered unhealthy because much of it is high in fat and ca
ID: 3205742 • Letter: F
Question
Fast food is often considered unhealthy because much of it is high in fat and calories. But are the two related? A dietician took a sample of 50 fast food burgers and collected data on the response variable, y calories, and the explanatory variable x = fat. The regression equation is y = 210 + 13x. Based on the regression equation, do the variables have a positive or negative association? _________ Interpret the slope of the regression line. What is the value of the y-intercept?________ Predict the calories of a hamburger that has 35 grams of fat. ___________ One hamburger in the sample had 35 grams of fat and 450 calories. Find the residual ______Explanation / Answer
a)as slope 13 has positive value, it has positive regression
b)regreesion equation slope is 13. which mean that for every one unit of fat there is corresponding increase of 13 calories.
c) intercept =210
d) predictd value of calorie =210+13*35=665
e) residual=actual value-predicted value =450-665 =-215
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