Answer :
Answer:
B) Horizontal line with a slope of zero.
Step-by-step explanation:
If y = 4, it never changes.
Slope = Δy/Δx, but Δy = 0, so slope = 0.
A is wrong. A vertical line has an undefined slope.
C is wrong because the line is horizontal.
D is wrong because a horizontal line has a zero slope.
The diagram shows that the graph of y=4 is a horizontal line with a slope of zero.
