Which equation represents the graph of the linear function?

A. y=-1/3x+1
B. y=-3x-1
C. y=3x+1
D.-3x+1

Question

Which equation represents the graph of the linear function?

A. y=-1/3x+1
B. y=-3x-1
C. y=3x+1
D.-3x+1

animecore1 · Answer

attachment

animecore1 · Answer

@baru

anonymous · Answer

D. y = -3 x + 1
The slope is -3 and the y intercept is +1.

animecore1 · Answer

Thanks, you think you could help me with some more?

dariusx · Answer

take one dot for example (1;-2) (x=1;y=-2)

then input it into the equations

the answer is D

animecore1 · Answer

Which equation represents the graph of the linear function?
  

 
 A.
y = −4x + 4
 
 B.
y = −4x − 4
 
 C.
y = 4x + 4
 
 D.
y = 4x − 4

animecore1 · Answer

attachment

dariusx · Answer

do as i told you, take one dot from the graph (x;y)

then put x into the equations and see if it equals y

dariusx · Answer

(-1;0) for example

input -1 into the equations and see where you get y = 0

dariusx · Answer

the answer is c

animecore1 · Answer

where do i input the -1?

dariusx · Answer

into the equation put -1 instead of x

animecore1 · Answer

oooh

animecore1 · Answer

i feel stupid, i kept putting the -1 in the y

animecore1 · Answer

I have just one more for you if you dont mind, i know how to solve the others but this one is different

dariusx · Answer

x is horizontal axis
y is vertical axis

a dot in the graph looks like this: (x;y)

x on the left side and y on the right

animecore1 · Answer

Complete the equation of the graphed linear function. Write the slope in decimal form.
 
y =  
 x +

animecore1 · Answer

hold on wait

animecore1 · Answer

y=____x+____

dariusx · Answer

take two dots from the graph
here we have (5;0) and (0;4)

an equation of a slope looks like this: y = ax + b

your goal is to find a and b


this is how we do it:

take a dot where y = 0 which in this case is the second dot (0;4)

from this we have: 
a*0 + b = 4
b = 4

then we take the first dot (5;0)

from this we have:
a*5 + 4 = 0
5a = -4
a = -4/5 = -0.8

and you're done. now input a and b into a slope equation y = ax + b

answer is: y = -0.8x + 4

dariusx · Answer

by the way, it's not necessary to take a dot where y = 0, but if you can do that then you should because it's simpler this way

animecore1 · Answer

That was an awesome explination! I've been stuck on these questions for 2 hours and now i get it, thanks so much

dariusx · Answer

no problem