Linear Functions and Function Notation

The function c(m) = 1.45m + 3.50 represents the cost of a taxi for m miles.
What does c(m) represent?

• Total Cost of a taxi

• Total Miles in taxi

Is this table a function or not a function? 

• Function

• Not a Function

Is this a function? Explain.

• Yes; it passes the horizontal line test.

• No; it is not a straight line.

• Yes; it passes the vertical line test.

• No; there is a line connecting the dots.

For the function f(x) = -3x + 3 find f(0).

• 0

• -3

• 3

• -1

Solve for f(5):
f(5) = -x + 4

• 9 

• 1

• -1

• -9

What is the value of x in:
f(4) = 3x - 1

• 11

• 4

• -1

• 0

Derek works at Subway making $9.25 an hour.  The function d(x)=9.25x tells us how much money Derek makes after x hours of working.  What is the meaning of d(4)=37?

• After 4 hours of work, Derek makes $37.

• Derek needs $4 more to have $37 total.

• After working for 4 days, Derek makes $37 total.

• After 4 hours of work, Derek now makes $37 an hour instead of $9.25.

A relation where every input in matches with exactly one output is called what?

• Relation

• Linear

• Exponential

• Function

Is this mapping a function or not a function? 

• Function

• Not a Function 

Given f(x) = -4x - 10 and f(x) = 10. Find x

• x = -5

• x = 5

• x = -50

• x = 30