The constant of is the value that relates two variables that are directly or inversely proportional. a. discrete function b. independent variable c. variation d. function notation

D.function notation

Step-by-step explanation:

we know that any function can be written as

For inversely proportional

where

k is constant of proportionality

For directly proportional

where

k is constant of proportionality

We can see that constant of proportionality is of functions

So,

The constant of function notation is the value that relates two variables that are directly or inversely proportional

step-by-step explanation:

47 - 90 = 43

43 - 180 = x

x = 137