Evaluation Functions Equations

What word phrase can you use to represent "5x + 2"?

• five times the sum of a number x and two

• two times the sum of a number x and five

• a number x times the sum of five and two

• the sum of five times a number x and two

Which is equivalent to 5(a + 6)?

• 5a + 6

• a + 30

• 5a + 30

• 5a - 30

Which relation is NOT a function?

• {(1,-5), (3,1), (-5,4), (4,-2)}

• {(2,7), (3,7), (4,7), (5,8)}

• {(1,-5), (-1,6), (1,5), (6,-3)}

• {(3,-2), (5,-6), (7,7), (8,8)}

Over what interval is the function increasing?

• x < -3

• x > -3

• y < -10

• y > -10

Is the graph a function?  Why?

• Yes, it's a perfect circle.

• No, if I draw a vertical line, it crosses twice.

• Yes - if I draw a vertical line, it crosses only once.

• No - it's a perfect circle.

An ________ says that two expressions are equivalent. 

• equation

• expression

• variable

• evaluation

What are the x- intercepts?

• x= 0 and x= -4

• x= 0 and x= 4

• y= 0

• x= 2

Evaluate f(x) = 3x - 4 at f(3)

• 5

• 13

• 2

Evaluate f(x) = -3x + 4 at f(-2)

• -2

• 2

• 10

Evaluate f(x) = 1/3x - 4 at f(3)

• 3

• -3

• 5