Algebra
12 Online
OpenStudy (anonymous):
how do you graph the line y=3x
Will fan and give medal
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OpenStudy (anonymous):
@jim_thompson5910 Please explain
OpenStudy (anonymous):
?
jimthompson5910 (jim_thompson5910):
let's make a T table
it's called this because it looks like T
|dw:1442289892384:dw|
jimthompson5910 (jim_thompson5910):
in the left column will go x
in the right column will go y
|dw:1442289912714:dw|
jimthompson5910 (jim_thompson5910):
now we pick any number we want
let's keep the numbers small and easy to manage
so let's say x = 0
what is y if x were 0?
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OpenStudy (anonymous):
3*0= 0 so 0,0?
jimthompson5910 (jim_thompson5910):
good
|dw:1442289993378:dw|
OpenStudy (anonymous):
then 3*1= (1,3)?
jimthompson5910 (jim_thompson5910):
and yes, because x = 0 and y = 0 they pair up to form the point (0,0)
jimthompson5910 (jim_thompson5910):
`then 3*1= (1,3)?`
also correct
if x = 1, then y = 3
we have another point (1,3)
|dw:1442290042356:dw|
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jimthompson5910 (jim_thompson5910):
let's do one more point
if x = 2, then y = ??
OpenStudy (anonymous):
right! last would be 2,6
jimthompson5910 (jim_thompson5910):
good, don't forget the surrounding parenthesis
jimthompson5910 (jim_thompson5910):
|dw:1442290091651:dw|
OpenStudy (anonymous):
Awesome! You are a life saver. Thank you kind sir
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jimthompson5910 (jim_thompson5910):
you're welcome