The plot shown below describes the relationship between students' scores on the first exam in a class and their corresponding scores on the second exam in the class. A line was fit to the data to model the relationship. Which of these linear equations best describes the given model?Based on this equation, estimate the score on the second exam for a student whose first exam score was 888888.

4.

step-by-step explanation:

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step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

answer: correct

step-by-step explanation: