How do you find the slope of 3x+y=7?

1 Answer
Alan P.
Aug 5, 2015

Slope of 3x+y=7 is -3

Explanation:

Method 1
The slope of a linear equation in standard form:
color(white)("XXXX")Ax+By = C
is -A/B

Method 2
3x+y=7 can be converted into slope intercept form:
color(white)("XXXX")y = -3x +7
where a linear equation in slope-intercept form
color(white)("XXXX")y = mx +b
color(white)("XXXX")color(white)("XXXX")has a slope of m
color(white)("XXXX")color(white)("XXXX")and a y-intercept of b

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