Evaluate it!
f(x)=2x+5
Find
f(3)
11
f(x)=x+5
If: f(x)=12
What is x?
x=7
What does the number inside the parentheses represent in:
f(5)
The input
Complete:
f(x)=3x+2
f(4)=
14
g(x)=4x-7
Find
g(-2)
-15
g(x)=2x+4
If:
g(x)=14
What is x?
x=5
If:
f(4)=13
What does the 13 represent?
The output
What is the correct way to evaluate f(-2) if:
f(x)=5x+1
A. 5-2=1
B. 5(-2)+1
C. 5(2)+1
D. 5-(-2)+1
B. 5(-2)+1
h(x)=(x+6)/2
Find
h(10)
8
f(x)=x/3+7
If: f(x)=12
What is x?
x==15
A function represents the amount of money earned from selling tickets at a football game.
M(n)=3n
(a) What does
M(8)
represent?
(b) What is the output?
It represents the amount of money earned from selling 8 tickets.
The output is $24
If:
f(-4)=8
what coordinate point is on the graph of:
y=f(x) ?
(-4,8)
f(x)=x^2-4
Find
f(-3)
5
h(x)=4x-9
If: h(x)=27
What is x?
x=9
If:
T(6)=68
and T represents temperature as a function of time, what does this statement mean?
The temperature is 68*F at 6 hours
A function is given by:
f(x)=2x+7
A student says:
f(5)=12
Is the student correct?
Explain why or why not
The student is incorrect.
f(5)=17