This work isnt too much or too long, but would really appreciate it when doing it if you do it in a way that shows how you think in other words dont just write down the answer!

**Tests**

**WHAT IS A FUNCTION?**

**1. f (x) = 3x + 2**

**a) Calculate f (2) **

**b) Calculate f (-1) **

**c) Solve the equation f (x) = 4**

**2. f (x) = 2x – 1**

**a) Calculate f (0) **

**b) Solve the equation f (x) = 0**

**3. V (x) = 200x – 8000, where V (x) is the profit of sec/money/dollar for x tickets sold.**

**a) Calculate the V (200)**

**b) Solve the equation V (x) = 200**

**c) Explain in words the difference between V (200) and V (x) = 200**

**d) Enter the dependent and independent variable.**

**4. The cost of renting a bike is 50 bucks in base-pay plus 10 bucks per hour.**

**a) Make a table that shows the cost of 2, 4 and 6 hours.**

b) Specify a function that describes the cost/dollar y as a function of time x hours.

c) Draw with the help of the table a graph of the function.

d) Describe the graph in words.

e) Which variable is the dependent and which is independent?