Answer:
slope = -

Explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Rearrange 5x + 30y = 18 into this form
Subtract 5x from both sides
30y = - 5x + 18 ← divide all terms by 30
y = -
+

with slope m = -
= -
