Hi

Does every straight line have a slope that is defined? NO

Vertical line, for example x = 3 has an undefined slope.

Using the point-slope formula, 

As the x value does not change:  Slope is undefined.  CANNOT divide by zero.



 

RELATED QUESTIONS

Determine the slope of a line that is perpendicular to the line defined by,

3x + 4y -... (answered by Earlsdon)

graph (-2,5) with slope of -1

does this mean the line when graphed will be a single... (answered by stanbon)

The slope of a straight line through A (3,2) is 3/4 . Find the coordinates of the points... (answered by josgarithmetic,MathTherapy)

What is the slope of a line defined by the equation 3x + y  =... (answered by stanbon)

Find the slope of a line if it is defined (-7,-11 and... (answered by MathLover1)

sketch the graph of a straight line that has positive slope and a negative y-intercept
 (answered by solver91311,Fombitz)

 Find the slope of a straight line that passes through given points (4/7,-1)... (answered by solver91311,Tatiana_Stebko)

Find equation of a straight line that passes through (-1;2) with the slope of... (answered by josgarithmetic)

For the straight line defined by the points (3, 51) and (5, 87), determine the slope and... (answered by oscargut,stanbon)