5
QuizMultiple Choice
Using Equations to Represent Trend Lines
Question 5 • CV Q4 M/J Math Gr 8 PreAlg 1205070
Andrea’s work to find the equation of a trend line through the points (48, 61) and (72, 195) is shown below.Andrea’s Work Step 1Step 2Step 3Step 4What was the first error that Andrea made?
Answer
A
Andrea used the reciprocal of the slope.B
Andrea made a computational error when she simplified m.C
Andrea substituted incorrectly when she solved for b.D
Andrea made a sign error when she solved for b.