The answer to the first part is D
Answer:
2
Step-by-step explanation:
consider the two points. Gradient=change in y/change in x. So 4/2=2
Note that

in the given closed interval, so the area is exactly given by the definite integral

(no absolute values needed!)
Integrating gives
Answer:
Find the value of x the value is x=4
3x4=12
12-5=7
Step-by-step explanation:
The answer to your problem is x=3