Answer:
Option (c) is correct.
The slope of a line is represented by the variable 'm'
Explanation:
Given : The slope a line
We have to choose which variable is used to represent the slope of a line.
Since, the general equation of line is represented by the equation
y = mx + c ,
where m is slope
and c is y intercept.
So , we represent the slope of line by the variable 'm'
Thus, The slope of a line is represented by the variable 'm'