anonymous
  • anonymous
The slope-intercept equation of a line is y = -7x - 2. What are the slope and y-intercept of the line? A.The slope is -7 and the y-intercept is (0, -2). B.The slope is -7 and the y-intercept is (0, 2). C.The slope is -2 and the y-intercept is (0, 7). D.The slope is -2 and the y-intercept is (0, -7).
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
c
anonymous
  • anonymous
thx
UsukiDoll
  • UsukiDoll
hmm? we have the equation in the form of y=mx+b where m is the slope and b is the y-intercept

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UsukiDoll
  • UsukiDoll
so if we're given y =-7x-2 and it's the slope intercept form of y=mx+b. What is m and what is b?
UsukiDoll
  • UsukiDoll
I will explain to you why it's NOT C If option C were to hold true, we would've gotten the equation y = -2x+7 The original equation, y =-7x-2 contains 2 negative numbers which is -7 and -2 Option C contains 1 positive number and 1 negative number which is -2 and 7
anonymous
  • anonymous
wait wht
UsukiDoll
  • UsukiDoll
try this again. if we're given y =-7x-2 and it's the slope intercept form of y=mx+b. What is m and what is b?
anonymous
  • anonymous
m is -7 and b is 2
anonymous
  • anonymous
right?
UsukiDoll
  • UsukiDoll
the m is correct.. the b isn't because it's a negative number
anonymous
  • anonymous
so -2
UsukiDoll
  • UsukiDoll
yes so m = -7 and b =-2 It makes sense because we were given y =-7x-2
UsukiDoll
  • UsukiDoll
m = slope and b = y-intercept therefore slope = -7 and y-intercept = -2
anonymous
  • anonymous
so a
UsukiDoll
  • UsukiDoll
"A.The slope is -7 and the y-intercept is (0, -2)." correct
anonymous
  • anonymous
thx can you help with one more
UsukiDoll
  • UsukiDoll
Be careful for those direct answer guys.. they are just doing it to gain medals and have no idea what they are doing. That previous user was lucky that it was the wrong answer. Had it been right, that user would've violated the Code of Conduct which is to never give direct answers and to guide users through the learning process. yeah sure.
anonymous
  • anonymous
If two lines are parallel and one has a slope of 8, what is the slope of the other line?
anonymous
  • anonymous
would it be the same
anonymous
  • anonymous
A.8 B.-1/8 C.-8 D.1/8
UsukiDoll
  • UsukiDoll
parallel lines look like this |dw:1435670221421:dw| they don't intersect .
anonymous
  • anonymous
ik so the slope would be 8
UsukiDoll
  • UsukiDoll
the slope is positive though. we are given that there are two parallel lines, but one of them has the slope of 8
anonymous
  • anonymous
its either a or d
anonymous
  • anonymous
wait its -8 :P
UsukiDoll
  • UsukiDoll
really? can you tell me why it's -8? I'm curious ^^
UsukiDoll
  • UsukiDoll
the problem is ... we are not given perpendicular lines.. we have 2 parallel lines
anonymous
  • anonymous
so its not -8
UsukiDoll
  • UsukiDoll
for perpendicular lines we can flip the slope over. perpendicular slopes have opposite signs.
anonymous
  • anonymous
soo for parallel the slope is the same
UsukiDoll
  • UsukiDoll
parallel means that the slopes are the same parallel lines are just lines that don't intersect. If I had 2 perpendicular lines I will be intersecting at some point
anonymous
  • anonymous
so its a
anonymous
  • anonymous
??
UsukiDoll
  • UsukiDoll
sorry I was responding to another question . yes it will be the same . since the slope is 8 we have 8 :D
anonymous
  • anonymous
thx

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