12 questions
How do you read f(x)?
f x
f of x
f parenthesis x
f with an x inside parenthesis
How would you write y = 2x - 3 in function notation?
y = 2x-3
f = 2x - 3
f(x) = 2x-3
How would you write y = 4x + 2 in function notation?
f(x) = 4x + 2
f = 4x + 2
y = 4x + 2
How would you write y = -5x + 12 in function notation?
y = -5x + 12
f = -5x + 12
f(x) = -5x + 12
If a question asks you to find f(4), what does that mean?
Let y = 4
Let x = 4
If a question asks you to find f(-9), what does that mean?
Let y = -9
Let x = -9
If a question asks you to find f(2), what does that mean?
Let x = 2
Let y = 2
If f(x) = 2x +1, what would be your first step to find f(4)?
Plug a 4 in for all the x's
Set the function equal to 4
Only plug a 4 into the right side
Only plug a 4 into the left side
If f(x) = 2x+1, what would the function look like once you substitute in a 1 to find f(1)?
f(x) = 21+1
f(1) = 2 (1) + 1
f(1) = 2x (1) + 1
If f(x) = -10x - 4, what would be your first step to find f(-9)?
Only plug a -9 into the left side
Set the function equal to -9
Only plug a -9 into the right side
Plug a -9 in for all the x's
If f(x) = -10x-4, what would the function look like once you substitute in a -9 to find f(-9)?
f(x) = 21+1
f(-9) = -10 (-9) -4
f(-9) = -10 (-9) + 4