For a function f, the formula . This formula computes the slope of the secant line through two points on the graph of F These are the points with x-coordinates x and x + h. The difference quotient<span> is used in the definition the derivative. sry cant help more</span>
Answer: 10
Step-by-step explanation:
It appears that
, so to check if this is the case, we can use the slope formula.

Since these slopes are negative reciprocals, we can see that this is the case. So, we can take
as the base of the triangle and
as the height of the triangle, and then use the formula
.
Using the distance formula,

So, the area is 
1/x is smallest when x is the largest it can be, so it is 1/3
1/y is smallest when y is the largest it can be, so it is 1/5
The average of 1/3 is 1/5 can be found by adding them together and dividing by 2:
1/3 + 1/5 = 5/15 + 3/15 = 8/15
Divide it by 2:
4/15
The answer is C.
Answer:
r = 3x + 1
Step-by-step explanation:
The area (A) of a circle is calculated as
A = πr² ( r is the radius )
Here
πr² = π(9x² + 6x + 1) ← divide both sides by π
r² = 9x² + 6x + 1 ← perfect square
r² = (3x + 1)² , thus
r = 3x + 1