What is the slope of the line 6x+3y-15=0 ?
The line ax + by + c = 0 can be written as y = mx + c, where m is the slope of the line and c is the y-intercept.
6x + 3y - 15 = 0
=> 3y = -6x + 15
=> y = -2x + 5
Therefore the slope is -2.
According to the y=mx+c, "m" symbolize the gradient/slope of the line
therefore y = (-6x+15)/3
y = -2x + 5
Hence slope of the line equals to (-2)