Intermediate Algebra (12th Edition)

A line in slope-intercept form has the equation: $y=mx+b$ ($m=slope$, $b=y-intercept$) We convert the line equation to slope-intercept form: $x+3y=3$ $3y=3-x$ $y=\frac{1}{3}(3-x)$ $y=\frac{1}{3}*3-\frac{1}{3}x$ $y=1-\frac{1}{3}x$ $y=-\frac{1}{3}x+1$ So the line has a $y$-intercept of 1 and a negative slope. Only (C) matches these properties.