Using Visual cues and principle of linear regression, the following deductions can be made about the questions posed on the graph.
- Yes, the relationship between calories and fat is highly positive because the data points are close to one another and the slope of the graph is positive.
- The trend line is very close to the data points because the points do not deviate much from one another.
- Yes, the trend line is linear because the trend of the graph is straight.
Equation of the trend line :
Slope = (400 - 200) ÷ (6 - 2) = 200/4 = 50
Intercept = 100
Linear equations ; y = 50x + 100
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