Which system or equation is represented in the graph? (A) y=-2
x-2y=6

(B) y=-2
x+2y=6

(C) y=-2
2×-y=3

(D) y=-2
2×+y=-3

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Step-by-step explanation:

since the line is horizontal and passes -2 the equation of the blue line should be

remember The form of equation of a line

where m is slope of the line and b is the y-intercept we can clearly see that the red line crosses y-axis at (0,-3) therefore b=-3

to figure out m we can consider the following formula:

from the graph we acquire ∆y=1 and ∆x=2

thus substitute:

so we have figured out m and b

therefore our equation of blue line is

our given options are in standard form so

move -3 to left hand side and change its sign:

cross multiplication:

move 6 to right hand side and x to left hand side and change its sign

multiply both sides by -1:

hence, our system of linear equation is

b is the final answer! : )

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10