Review

Solve: 10x + 9 = 4x - 9

• 3

• 0

• -18

• -3

Solve: 2(4x-3) - 8 = 4 + 2x

• x=5/3

• x=3

• x=1

• x=2

Solve m - n = 5 for m.

• m = n + 5

• m = n - 5

• m = 5n

• m = 5 - n

Solve:

y = mx + b , for b

• b = y - mx

• b = y + mx

• b = mx - y

• b = -y - mx

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Is this graph a function or not a function? 

• Function 
• Not a Function 

2x + 3(5x - 7) = 47

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• 4