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anonymous
 one year ago
A line passes through the point (–3, –4) and its yintercept is (0, –9). What is the equation of the line that is parallel to the first line and passes through the point (3, –7)?
anonymous
 one year ago
A line passes through the point (–3, –4) and its yintercept is (0, –9). What is the equation of the line that is parallel to the first line and passes through the point (3, –7)?

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midhun.madhu1987
 one year ago
Best ResponseYou've already chosen the best response.1dw:1437711431685:dw First find the Slope of the First Line using the formula: Slope, m = (y2y1)/(x2x1) The slope of second line and first line will be Equal. Because parallel lines have equal slope. once you get the slope of second line, the equation can be written : y  y1 = m(x  x1)

midhun.madhu1987
 one year ago
Best ResponseYou've already chosen the best response.1dw:1437711852579:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im not sure i understand

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Can you find the slope of the first line?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im confused with the whole thing, i dont understand any of it

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Ok, are you familiar with this formula? dw:1437712598401:dw

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Where m is slope of a line

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Great! :) Can you plug in the two points given for the first line to find the slope?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do you mean (3,4) & (0,9) ?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Hm, I get the slope to be 5/3dw:1437713469475:dw

midhun.madhu1987
 one year ago
Best ResponseYou've already chosen the best response.1dw:1437713498055:dw this is what @JoannaBlackwelder tried to say... you need to susbstitute the values of x1, x2, y1, y2

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1And the slope of parallel lines is equal. :)

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1So, the slope of the other line is also 5/3. Making sense so far?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Yes, but your slope was off.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Any ideas on finding the equation of the second line, using the slope of 5/3 and the point (3,7)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay one question, if a slope of a line is 1/2 the slope that is parallel to it would be 2 right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0or would it be just 2?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Parallel lines have the exact same slope

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so it would be 1/2 ?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Perpendicular lines have negative reciprocal slopes is what I think you were thinking about before.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0could you help with this one as well? The equation of a line is y = 2x + 3. What is the equation of the line that is parallel to the first line and passes through (2, –1)?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Sure, can you tell what the slope of the line given is?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Close, just the 2 is the slope.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Now, we need to use that slope since the lines are parallel and the point (2,1) to find the new equation of the line.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay how do i set up the equation?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1We use the general formula y=mx+b

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Plug in m, and the x and y coordinate we have

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1437716031316:dw

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1And solve for b

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Can you find b?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02(2) would turn into 4x right? would i then divide that by 1 to get b?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1437716846824:dw

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1437716867087:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes ! that make sense!

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Awesome! So then we can plug in m and b to make y=2x+(6)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank you so much !!
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