Question

for each line, determine whether the slope is positive, negative, zero, or undefined.
line 1
line 2
line 3
line 4
positive
negative
zero
undefined
positive
negative
zero
undefined
positive
negative
zero
undefined
positive
negative
zero
undefined

Explanation:

Step1: Analyze Line 1 slope

Line 1 rises right, so slope is positive.

Step2: Analyze Line 2 slope

Line 2 is vertical, so slope is undefined.

Step3: Analyze Line 3 slope

Line 3 falls right, so slope is negative.

Step4: Analyze Line 4 slope

Line 4 is horizontal, so slope is zero.

Answer:

Line 1: Positive
Line 2: Undefined
Line 3: Negative
Line 4: Zero