y = mx + b
"m" is the slope, "b" is the y-intercept
2x + y = 7 Isolate the "y" by subtracting 2x on both sides
2x - 2x + y = 7 - 2x
y = 7 - 2x or y = -2x + 7
The slope is -2
The y-intercept is 7
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