Evaluating and Graphing Piecewise

Use the graph to evaluate f(5)

• 0

• 2

• 4

• 6

• 0

• 2

• 4

• 6

Evaluate the function when x = 2  {HINT: Should you substitute into the top equation or the bottom equation?}

• f(2) = 2(2) - 5 = 1

• f(2) = 2(2) - 5 = -1

• f(2) = ½(2) + 1 = 2

• f(2) = 4

Evaluate the function when x = 4  {HINT: Should you substitute into the top equation or the bottom equation?}

• f(4) = 2(4) - 5 = 3

• f(4) = 2(4) - 5 = -1

• f(4) = ½(4) + 1 = 3

• f(4) = 4

What is g(7) if:

• -17

• -13 

• 13       

• 17

Which function should you use to evaluate f(x) when x = 4

• f(x) = x-2

• f(x) = 2x + 1

• f(x) > 0

• f(x) = 4

Use the graph to evaluate f(2)   {HINT: think back to graphing inequalities on the number line -- should you pick value for open circle or closed circle?}

• 1

• 2

• 3

• 4

If you have $75, how many days can you rent the Karaoke machine?

• 0 days

• 1 day

• 2 days

• 3 days

Find f(2)

• f(2) = 0

• f(2) = 1

• f(2) = 3

• f(2) = 4

Find f(-2)

• f(-2) = 0

• f(-2) = 1

• f(-2) = 3

• f(-2) = 4