The graph of the line y=4 is a

a) vertical line with a slope of zero.

b) horizontal line with a slope of zero.

c) vertical line with an undefined slope.

d) horizontal line with an undefined slope.

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.

72 is the answer to this problem

the answer is $42.96

step-by-step explanation: