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Mathematics 20 Online
OpenStudy (anonymous):

Points A and B lie on the graph of the equation y = 7x. What are the y-coordinates for each point? Point A: (−2, ) Point B: (4, )

jimthompson5910 (jim_thompson5910):

point A: (-2, ) means x = -2 and y is unknown

jimthompson5910 (jim_thompson5910):

y = 7x y = 7*(-2) ... replace every copy of x with -2 y = -14

jimthompson5910 (jim_thompson5910):

so point A is (-2, -14)

OpenStudy (anonymous):

What is point B

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

use what I did for A and tell me what you get

OpenStudy (anonymous):

I don't understand how you got 7

jimthompson5910 (jim_thompson5910):

it's from y = 7x

jimthompson5910 (jim_thompson5910):

they gave you that equation to work with

jimthompson5910 (jim_thompson5910):

"Points A and B lie on the graph of the equation y = 7x."

OpenStudy (anonymous):

Oh Duh. So y=28

jimthompson5910 (jim_thompson5910):

good, B is (4, 28)

OpenStudy (anonymous):

OKayt hanks.

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