A line passes through the points (3,18) and (6,21). Write an linear function rule in terms of x and y for this line.

1 answer:

3 0

Slope is rise over run so

(21-18)/(6-3), 3/3=1, slope is 1

plug in to find b value

18=3+b, b=15

ANSWER: y=x+15

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