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Estimating equations of lines of best fit, and using them to make predictions

A random sample of people was asked to report the age and mileage of their primary car. A line was fit to the data to model the relationship.
Which of these linear equations best describes the given model?
Choose 1 answer:
Choose 1 answer:
Based on this equation, estimate the miles driven on a car whose age is 77 years.
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}
thousand miles