Answer:
y = -1/5x - 4
Step-by-step explanation:
Slope-intercept form: y = mx + c
m = gradient
y = y-intercept
3x + 15y = -60
1. Take away 3x from both sides.
15y = -3x - 60
2. Divide by 15 from both sides.
y = -3/15x - 60/15
3. Simplify.
y = -1/5x - 4