(4,-1) is the correct answer.
Hope this helps:)
<span> 16ft long shadow of a building when the building true height is</span> 40 ft
1 ft long shadow of a building when the building true height is <span>40/16 ft
</span>2 ft long shadow of a person when the building true height is <span>(40x2)/16 = 5ft (ans)
</span>
Answer: 
Step-by-step explanation:
To find the slope, you want to use the formula
.

Now we know the slope is
.