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? QUESTION The points (3, r) and (7, -4) lie on a line with slope 4. Find the missing coordinate r.
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3 votes
? QUESTION

The points (3, r) and (7, -4) lie on a line with slope 4. Find the missing coordinate r.

User Druss
by
7.8k points

1 Answer

4 votes

Answer:

-20

Explanation:

y = 4x + b

-4 = 4(7) + b

-32 = b

y = 4x -32

r = 4(3) - 32

r = -20

User Dafen
by
6.2k points
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