The general equation of a line can be given as
y = mx + b
Clearly, the value of the slope is given as m;
hence the value of m gives the slope of any straight line.
There are 4 different types of slopes are Positive slope, Negative slope, zero slope, and undefined Slope
The slope of a line is nothing but the change in y coordinate with respect to the change in x coordinate of that line.
If two lines are perpendicular then the product of slope is equal -1.
Let m1 and m2 be the slopes of two lines then:
m1 × m2 = -1 ….(1)
Let m1 = 1/3.
From equation (1)
⇒ 1/3 × m2 = -1
m2 = -3
Hence, the required slope is -3.
If the slope of a line is 1/3,the slope of a line perpendicular to this line is -3. If two lines are perpendicular then the product of slope is equal -1.