Revision Questions

y ≥ 2

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y = -2x + 2

y = -2x - 2

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y = -2x - 4

y = 4x +2

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y > -x -2

y < -5x + 2

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y ≤ ½ x + 2

y < -2x - 3

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Solve using substitution:

y = 6x - 11

-2x - 3y = -7

• x=1 , y=4

• x=6 , y= -6

• x=0 , y= -2

• x=2 , y=1

Solve using substitution:

-5x + y = -2

-3x + 6y = -12

• x=1 , y=4

• x=6 , y= -6

• x=0 , y= -2

• x=2 , y=1

Solve using elimination:

-4x - 2y = -12

4x + 8y = -24

• x=1 , y=4

• x=6 , y= -6

• x=0 , y= -2

• x=2 , y=1

Solve using elimination:

5x + y = 9

10x - 7y = -18

• x=1 , y=4

• x=6 , y= -6

• x=0 , y= -2

• x=2 , y=1

Make a conjecture about the next item in the following sequence:

4, 6, 9, 13, 18, ........

• add 2; the next number is 20

• multiply by 2; the next number is 36

• adding 1 to the previous pattern (+2, +3, +4, .....); the next number is 24