Ilovemeowmeow
What is the y coordinate of the y−intercept of the line that passes through the points
(−2, −2) and (2, 4)?



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3psilon
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Use the slope formula
\[\frac{ y_{2}y_{1} }{ x_{2}x_{1} }\]

Ilovemeowmeow
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Oh do this again? Okay got it hahah

3psilon
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\[\frac{ 4(2) }{2(2) }\]

3psilon
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Yes . Get it ? :)

Ilovemeowmeow
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I do! thanks!

3psilon
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But wait that's the slope. You need the y intercept which is the b in y = mx +b

Ilovemeowmeow
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oh.

3psilon
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So we found the slope m . Now just plug in One of the two coordinates and the slope into y = mx + b and solve for b. Let me know if you need more help

Ilovemeowmeow
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I need more help forsure

3psilon
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Ok did you find the slope m?

Ilovemeowmeow
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finding it now.

3psilon
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Ok let me know what you get

Ilovemeowmeow
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I got 3/2?

3psilon
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Good job! Now we use the slope intercept formula y = mx + b

3psilon
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pick either (−2, −2) or (2, 4) to plug in for x and y

3psilon
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And you'll be able to solve for the y  intercept b

Ilovemeowmeow
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so 2=3/2(2)+b? lo

3psilon
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Perfect! Now just solve for b and you have your answer!

Ilovemeowmeow
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how though?!

Ilovemeowmeow
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I just cant find an answer...

3psilon
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Just isolate the term b

3psilon
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b is the y intercept

Ilovemeowmeow
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Is 1=3/2(2) it?

3psilon
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nope I'll draw it out for you. one sec

Ilovemeowmeow
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ok

3psilon
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dw:1350673516403:dw

Ilovemeowmeow
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So the answer is 1?

3psilon
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Yes , b = 1 . Do you get it?

Ilovemeowmeow
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Now that you wrote it out, i get it. thank you!