Making Predictions Answers

Miguel is calculating the slope of a line of best-fit in the scatterplot below. Which pair of points would be best for Miguel to use?

What is the slope of the line of best-fit in the scatterplot below?

Loren solved the equation for b as part of her work to find the equation of a trend line that passes through the points (1, 130) and (10, 149). What error did Loren make?

Which pair of points should be used to find the line of best-fit for the scatterplot?.

What is the slope of a trend line that passes through the points (5, 80) and (7, 65)?

Mia’s work to find the slope of a trend line through the points (3, 10) and (35, 91) is shown below.Mia’s WorkStep 1Step 2Step 3What was the first error that Mia made?

Darren is finding the equation in the form for a trend line that passes through the points (2, 18) and (–3, 8). Which value should he use as b in his equation?

Melanie and Tracy are each finding the equation of the trend line that fits the data in the table below. Participation in the School BandYearNumber of students201048201152201255201359Melanie uses the ordered pairs (2010, 48) and (2013, 59) to find her equation. Tracy defines x as the number of years since 2010 and uses the ordered pairs (0, 48) and (3, 59) to find her equation. How will the two girls’ equations compare?

Which equation of a line of best-fit reflects a negative correlation?

A basketball coach plotted data about her shooting guard’s playing time and point scoring in a scatterplot. Shooting Guard Minutes Played and Points Scored Which is the equation of the line of best-fit?