write an equation in slope - intercept form for the line with slope - 3 and y - intercept - 1.

Explanation:

Step1: Recall slope - intercept form

The slope - intercept form of a line is $y = mx + b$, where $m$ is the slope and $b$ is the y - intercept.

Step2: Substitute given values

Given $m=-3$ and $b = - 1$, substituting into the formula gives $y=-3x+( - 1)$.

Step3: Simplify the equation

$y=-3x - 1$.

Answer:

$y=-3x - 1$