Answer and explain these problems to me

What variable is used to represent the slope of a line?

a) The variable m is usually used to represent the slope of a line.
b) The variable k is usually used to represent the slope of a line.
c) The variable s is usually used to represent the slope of a line.
d) none of the above





2. Given a linear equation in the form y = ax, if a > 0 then the greater the coefficient a _______.

a) the greater the slope of the equation
b) the smaller the slope of the equation
c) the longer the line is
d) the shorter the line is





3. Given a linear equation in the form y = ax, if a < 0 , then _______.

a) the absolute value of the slope is less than 1
b) the slope is negative
c) the slope is positive
d) the equation is a horizontal line




because if you explain and answer these I will understand the other problems and be able to do my lesson.

a
a
b