-4f+8=4f-8
+4f. +4f
8=8f-8
+8. +8
16=8f
16/8=2
f=2
Answer:
The value of 4 is an input of the function
Step-by-step explanation:
Define the variables
Let
x ----> the independent variable or input value
y ----> the dependent variable or output value
Looking at the graph
The domain of the graph (all possible values of x) is equal to the interval
[1,∞)

All real numbers greater than or equal to 1
The range of the function (all possible values of y) is equal to the interval
(-∞,3]

All real numbers less than or equal to 3
therefore
The value of 4 is an input of the function
Here’s my answer, hope this helps!
Answer:
-8
Step-by-step explanation:
42 less than x
x-42=-50
inverse operation add 42 to -50 and you get -8
D, the last number line.
3 and -3 both satisfy the equation.