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Please help..can't figure it out!

Please help..can't figure it out!-example-1

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Answer:

B) y = x + 2 and y = -x - 4

Explanation:

The equation of a line is represented with y = mx + b.

"x" and "y", when substituted, tell you if a point (x, y) is on the line.

"m" is slope, and tells if it goes up (positive slope) or down (negative)

"b" is the y-intercept, when the line hits the y-axis.

In the graph, we have two lines. One goes upwards (read from left to right), and the other goes downwards.

The graph that goes upwards hits the y-axis at positive "2".

The graph that goes downwards hits the y-axis at (negative) "-4".

Since the choices only have positive 1 or negative 1 as the slope, we only have to worry if it goes up or down.

Take the key information, slope and y-intercept, to write the equations.

"upwards slope, y-axis at 2"

y = x + 2

"downwards slope, y-axis at -4"

y = -x - 4

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