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Mathematics 16 Online
OpenStudy (anonymous):

Help Plzz Help Me ASAP Its about Graphing

OpenStudy (anonymous):

Picture Taken from Carnige

jimthompson5910 (jim_thompson5910):

y = mx+b y = 2x + b ... Plug in m = 2 4 = 2(3) + b ... Plug in (3,4) or x = 3 and y = 4 Now solve for b

OpenStudy (anonymous):

can u explain how u did that

jimthompson5910 (jim_thompson5910):

Parallel lines have equal slopes

jimthompson5910 (jim_thompson5910):

The slope of y = 2x-1 is 2, so the slope of this parallel line is m = 2

jimthompson5910 (jim_thompson5910):

The point (3,4) means that x = 3 and y = 4

jimthompson5910 (jim_thompson5910):

You plug all this info into y = mx+b and you solve for b to find the equation of the parallel line.

jimthompson5910 (jim_thompson5910):

Tell me what you get when you solve for b

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

|dw:1346537844471:dw| is that the correct equation

jimthompson5910 (jim_thompson5910):

yes, now multiply 2 and 3 to get 6 an go from 4 = 2*3 + b to 4 = 6 + b

jimthompson5910 (jim_thompson5910):

to go from*

OpenStudy (anonymous):

4=6b

jimthompson5910 (jim_thompson5910):

no, you can't add 6 and b to get 6b

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

so what do i do now

jimthompson5910 (jim_thompson5910):

Subtract 6 from both sides 4 = 6 + b 4 - 6 = 6 + b - 6 -2 = b b = -2 So the equation of the line CD is y = 2x - 2

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