Best Answer

A zero slope is horizontal or flat, and an undefined slope is vertical or straight up and down.

While this answer is in the textbook and notebook of anyone studying the subject, it is easy to get the two mixed up on test day. Try the following mnemonic (memory aid):

Look at the letters "z" for zero, and "u" for undefined. The top and bottom of the letter Z are horizontal lines. The two sides of the letter U are vertical lines.

Q: How do you tell if a slope is zero or undifined?

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A line with an undefined slope is a vertical line. A line with a slope of zero is a horizontal line. If you use the formula for slope m = (y2-y1) divided by (x2-x1)... For an undefined slope you will get zero in the denominator, which you cannot have because you cannot divide by zero. For a slope equal to zero, you will get a zero in the numerator. Zero divided by any non-zero denominator, will give you a slope of zero.

The slope when you get a zero on top would be zero. Zero divided by any number is zero.

Flat slope is slope equals zero.

A line with a slope of zero is a flat, vertical line.

The parallel line would also have a slope of zero (both are horizontal lines).

Related questions

A slope is 0 if it is a straight horizontal line. A slope is undefined if it is a straight vertical line.

Yes, it is true; slope zero is no slope.

A line with an undefined slope is a vertical line. A line with a slope of zero is a horizontal line. If you use the formula for slope m = (y2-y1) divided by (x2-x1)... For an undefined slope you will get zero in the denominator, which you cannot have because you cannot divide by zero. For a slope equal to zero, you will get a zero in the numerator. Zero divided by any non-zero denominator, will give you a slope of zero.

The slope when you get a zero on top would be zero. Zero divided by any number is zero.

positive slope negative slope undefined slope zero slope

Horizontal lines always have a slope of zero. (i.e completely flat, level surfaces have a slope of zero). However a line does not have to have a slope of zero in order to be a line.

A line with slope of zero is horizontal. A line with no slope is vertical because slope is undefined on a vertical line.

0/0 is undefined because you cannot divide any number into 0 parts.

Flat slope is slope equals zero.

A horizontal line has a slope of zero. For a vertical line, the slope is not defined (change of y / change of x would result in a division by zero).A horizontal line has a slope of zero. For a vertical line, the slope is not defined (change of y / change of x would result in a division by zero).A horizontal line has a slope of zero. For a vertical line, the slope is not defined (change of y / change of x would result in a division by zero).A horizontal line has a slope of zero. For a vertical line, the slope is not defined (change of y / change of x would result in a division by zero).

A line with a slope of zero is a flat, vertical line.

run as in slope of a line is zero . horizontal lines have no slope and vertical lines have a slope of zero