What is the slope of the line with equation y = –x?

A.
0

B.
1

C.
The slope is undefined.

D.
–1

Question

What is the slope of the line with equation y = –x?
 
 A.
0
 
 B.
1
 
 C.
The slope is undefined.
 
 D.
–1

rebeccaxhawaii · Answer

http://prntscr.com/axov01

rishavraj · Answer

y = mx  + c
m - slope
c - y intercept

rebeccaxhawaii · Answer

hint: as you can see the line is decreasing therefore making a negative slope.

mnr134 · Answer

so its 0

rebeccaxhawaii · Answer

this would be a zero|dw:1461797913973:dw|

rebeccaxhawaii · Answer

and also 0 is negative nor positive

mnr134 · Answer

wait so its c.

rebeccaxhawaii · Answer

review what i have told you - what is a negative number?

usukidoll · Answer

. y = -x is a reflection of y = x. 
since y = x is increasing, y = -x would be decreasing..

usukidoll · Answer

https://www.montereyinstitute.org/courses/Algebra1/COURSE_TEXT_RESOURCE/U04_L1_T1_text_final_files/image014.gif undefined slope is a vertical line and all points on the line have the same x-coordinate.

usukidoll · Answer

so undefined slope is out of the picture here... same for the 0 choice because that's just a horizontal line.

mnr134 · Answer

so its d

usukidoll · Answer

yeah it's a negative slope

I'm going to use the slope formula on two points

y  = -x

x = 1,2
y = -1,-2
(1,-1), (2,-2)
x1 y1   x2   y2

x2-x1/y2-y1
2-1/-2-(-1)
1/-2+1
1/-1 = -1
which is a negative slope so it's d