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8th grade (Illustrative Mathematics)

Course: 8th grade (Illustrative Mathematics) > Unit 6

Lesson 3: Lesson 4: Fitting a line to data
Math
8th grade (Illustrative Mathematics)
Unit 6: Associations in data
Lesson 4: Fitting a line to data
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Estimating equations of lines of best fit, and using them to make predictions

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Problem

A panel of judges was asked to judge the quality of different kinds of potato chips. The relationship between their ratings and the price of the chips is shown in the scatter plot below. A line was fit to the data to model the relationship.
A scatterplot plots points x y axis. The y axis is labeled Rating. The x axis is labeled Cost per package in dollars. Points rise diagonally in a relatively narrow pattern between (80 hundredths, 1 half) and (2 and 8 tenths, 6). The line passes between the points (1, 2) and (2, 6). All values estimated.
Which of these linear equations best describes the given model?
Choose 1 answer:
Based on this equation, estimate the rating of chips whose cost is dollar sign, 1, point, 10, point
Round your answer to the nearest hundredth.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
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