Answer:

Step-by-step explanation:
we are given an algebraic function in x, such that

To find when second derivative >0
For this let us find first and second derivative by successive differentiation.

when ii derivative >0 we have
60x^3-30>0

f"(x)>0 in

Note: Consider we need to find the factor form of the given expression by taking out the GCF.
Given:
The expression is:

To find:
The factor form of the given expression.
Solution:
We have,

It can be written as:

Taking out the greatest common factor (GCF), we get

Therefore, the factor form of the given expression is
.
Answer:
domain is all real numbers
range is y is less than or equal to 1 (it is a downward parabola)
No it is not proportional. Since she brought the last apple for 1/2 the price, the equation won’t be linear (straight line) anymore so it won’t be proportional. Proportional means the same unit rate.