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How to write slope-intercept form through (-1,3) and a slope of -1

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The slope-intercept form:


y=mx+b

m - slope

b - y-intercept

We have the slope m = -1 and the point (-1, 3). Substitute:


3=(-1)(-1)+b


3=1+b subtract 1 from both sides


2=b\to b=2

Answer: y = -x + 2

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