What is the slope of the line passing through points (-8,5) (-8,-8)

Undefined.

Step-by-step explanation:

SLOPE FORMULA:

y₂= (-8)

y₁=5

x₂=(-8)

x₁=(-8)

Solve & simplify.

Therefore, the slope is undefined.

The area of the room is given by:
 A = (6) * (12)
 A = 72 feet ^ 2
 For each 40 watt bulb we have:
 (515) / 72 = 7.152777778 footcandle
 The number of 40 watt bulbs is:
 N = (50) / (7.152777778)
 N = 7, 40 watt bulbs
 
 will be required about:
 N = 7, 40 watt bulbs