Answer:
no it is not
Step-by-step explanation:
i drew the line bc in order for it to be a function there would have to be only one point in each line
hopefully this helps :)
have a nice day !!

= - 20
You can subtract the numbers in the parenthesis:
(3-11) = (-8)
Multiply the denominator to both sides so it cancels out and isolates the variable

× -8 = - 20 × -8
-8 and -8 cancels out
k = 160Quick check:

= -20

= - 20
- 20 = - 20
Yes its right
the answer is:
k =160
Answer:
Length = 
Breadth = 
Step-by-step explanation:
Let
be the length of the garden
and
be the width of the garden
From the details of the cost in the question we get

Now area of the garden is

Differentiating with respect to x we get

Equating with 0

Double derivative of the area is

So, area is maximum at 

So, the length and breadth of the rectangle is
.
The line that is being constructed in the series of diagrams provided is perpendicular.
Parallel lines = same slope
a = -2
perpendicular lines = negative reciprocal slope
a = 1/2