Question:
The quantities x and y are proportional.

Find the constant of proportionality (r)
Answer:

Step-by-step explanation:
Given

Required
Determine the constant of proportionality (r)
Constant of proportionality (r) is calculated as

When

Substitute these values in the given formula

Convert both fractions to improper fractions

Multiply both sides by 


Reorder


Divide the numerator and denominator by 3


Convert to mixed fraction

<em>Hence, the constant of proportionality is </em>
<em></em>
Answer:
Table one respresents a function
Step-by-step explanation:
The reason is because the other 3 tables have two of the same x inputs but having a different out put
Hope this helps
Answer:
A
Step-by-step explanation:
The average rate of change of f(x) in the closed interval [a, b ] is

Here [ a, b ] = [ 2, 6 ], thus
f(b) = f(6) = -
+ 70 = - 64 + 70 = 6
f(a) = f(2) = - 2² + 70 = - 4 + 70 = 66
average rate of change =
=
= - 15 → A