Answer:

1.

y = 2x –3

x 2 7 8 5 10 4 3 6

y 1 11 13 7 17 5 3 9

Solution:

x = 2

y = 2x–3

y = 2(2) -3

y = 4 -3

y = 1

x= 7

y = 2(7)–3

y = 14 - 3

y = 11

x = 8

y = 2(8) – 3

y = 16 – 3

y = 13

x = 5

y = 2(5) – 3

y = 10 – 3

y = 7

x = 10

y = 2(10)–3

y = 20 — 3

y = 17

x = 4

y = 2(4)-3

y = 8–3

y = 5

x = 3

y = 2(3)–3

y = 6–3

y = 3

x = 6

y = 2(6)–3

y = 12–3

y = 9

2.

r 3 2 1 0 -1 -2 -3 -4

s 12 10 8 6 4 2 0 -2

Solution

s = 2r+6

r = 3

s = 2(3)+6

s = 6+6

s = 12

r = 2

s = 2(2)+6

s = 10

r = 1

s = 2(1)+6

s = 8

r = 0

s = 2(0)+6

s = 6

r = -1

s = 2(-1)+6

s = 4

r = -2

s = 2(-2)+6

s = 2

r = -3

s = 2(-3)+6

s = 0

r = -4

s = 2(-4)+6

s = –2