I hope this helps you
x= -2
h (-2)= 3. (-2)+1
h (-2)=-6+1
h (-2)= -5
Complete Question
The complete question is shown on the first uploaded image
Answer:
The point of diminishing returns (x , y ) is (11, 21462)
Step-by-step explanation:
From the question we are told that
The function is 
Here R(x) represents revenue (in thousands of dollars) and x represents the amount spent on advertising (in thousands of dollars).
Now differentiating R(x) we have

Finding the second derivative of R(x)

at inflection point 
So 
=> 
substituting value of x into R(x)


Now the point of diminishing returns (x , y ) i.e (x , R(x) ) is
(11, 21462)
Answer:
109
Step-by-step explanation:
15+15+15= 45
7+7+7=21
4+4+4=12
4+15×7=109
I hope this helps!
The rule is exponential function.