Put the following equation of a line into slope-intercept for, simplifying all fractions

3x+15y=-60

To put the equation 3x + 15y = -60 into slope-intercept form, we need to solve for y.

First, let's isolate the term with y on one side of the equation:
15y = -3x - 60

Next, divide both sides of the equation by 15 to simplify the fraction and solve for y:
y = (-3/15)x - 60/15

Simplifying the fractions:
y = (-1/5)x - 4

Therefore, the equation 3x + 15y = -60 in slope-intercept form is y = (-1/5)x - 4.