Answer: Slope = 3
Explanation:
On a 2D-Plane, any two lines with the same slope and a different y-intercept will be parallel
Knowing this, any line with the same slope as our given line and a different y-intercept will be parallel to it
Therefore, any line with a slope of 3 and a y-intercept other than 5 will be parallel to y = 3x + 5