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**Hi888** Please help me with this problem. How can I form equations out of the given relations and graph each?

Here is the given relations

a. (2, 1), (1, -1), (-1, -5), (-2, -7)

b. (1, -2), (2, -4), (-1, 2)

Example:

(4,8), (2,4), (-4,-8), (-1,-2), (3,6)

Answer: y = 2x

(3,1), (-1,-3), (0,-2), (2,0), (1,-1)

Answer: y = x-2

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Is there any easy way where I can find the equation of a given relation? Because based on the examples, it's quite easy but in the exercise the given relations are hard.