Chapter 4 - Quadratic Functions and Equations - 4-8 Complex Numbers - Practice and Problem-Solving Exercises - Page 255: 83

$y = 3x - 4$

Use the slope-intercept form of a line, which is given by the formula: $y = mx + b$, where $m$ is the slope and $b$ is the $y$-intercept. With $m=3$ and $y$-intercept (which is $b$) of $-4$, substitute these the values into the slope-intercept formula above: $$y = 3x + (-4)$$ Simplify to obtain: $$y = 3x - 4$$