HarveyKlaus wrote:

Which of the following could be the equation of line m?

(A) 6y + 6x = 7

(B) 3y = -4x - 3

(C) 5y + 10 = -4x

(D) y = 2

(E) x = -2

Hey all,

Does anyone know how to solve this problem? The point in the official answer which I am struggling to understand is that I can't determine by looking at the graph if the line has a positive slope or negative. for example, the official answer starts by saying that " Since there are no numbers on the graph, you can’t determine the actual equation of the line, but the line clearly has a negative slope (it points down when reading from left to right) and a positive y-intercept (it crosses the y-axis

above the origin)"

How do we read from "LEFT TO RIGHT" I am not getting it. Any help?

Thank you!

There is one important thing you need to notice here.

y intercept of line m is positiveAs per the diagram when y is 0, x is +ve. Now lets look at the options

(A) 6y + 6x = 7 --> CORRECT, when y is 0, x is +ve.

(B) 3y = -4x - 3 --> INCORRECT, when y is 0, x is -ve.

(C) 5y + 10 = -4x --> INCORRECT, when y is 0, x is -ve.

(D) y = 2 --> Clear OUT. It must be || to x axis.

(E) x = -2 --> Clear OUT. It must be || to y axis.

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