- 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).

- katieb

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- anonymous

c

- anonymous

thx

- 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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## More answers

- 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

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

wait wht

- 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

m is -7 and b is 2

- anonymous

right?

- UsukiDoll

the m is correct.. the b isn't because it's a negative number

- anonymous

so -2

- UsukiDoll

yes so m = -7 and b =-2
It makes sense because we were given y =-7x-2

- UsukiDoll

m = slope and b = y-intercept
therefore
slope = -7 and y-intercept = -2

- anonymous

so a

- UsukiDoll

"A.The slope is -7 and the y-intercept is (0, -2)." correct

- anonymous

thx can you help with one more

- 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

If two lines are parallel and one has a slope of 8, what is the slope of the other line?

- anonymous

would it be the same

- anonymous

A.8
B.-1/8
C.-8
D.1/8

- UsukiDoll

parallel lines look like this |dw:1435670221421:dw| they don't intersect .

- anonymous

ik so the slope would be 8

- 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

its either a or d

- anonymous

wait its -8 :P

- UsukiDoll

really? can you tell me why it's -8? I'm curious ^^

- UsukiDoll

the problem is ... we are not given perpendicular lines.. we have 2 parallel lines

- anonymous

so its not -8

- UsukiDoll

for perpendicular lines we can flip the slope over. perpendicular slopes have opposite signs.

- anonymous

soo for parallel the slope is the same

- 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

so its a

- anonymous

??

- UsukiDoll

sorry I was responding to another question . yes it will be the same . since the slope is 8 we have 8 :D

- anonymous

thx

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