To determine which equations represent lines with a slope of 3, we need to look for equations that are in the slope-intercept form:

$y = mx + b$

where $m$ is the slope and $b$ is the y-intercept.

If the slope $m$ is 3, then we are looking for equations of the form:

$y = 3x + b$

where $b$ can be any value.

Please provide the equations you want to check, and I will help you identify which ones have a slope of 3.