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3) a) x=1 y=3 ---> y = 3x
x=2 y=4 ---> y = 2x
x=3 y=5 ---> y = x + 2
x=4 y=6 ---> y = 2x + 2
b) x=0 y=0 ---> y = 3x
x=1 y=3 ---> y = 2x + 1
x=2 y=6 ---> y = 2x + 2
x=3 y=9 ---> y = 2x + 3
c) x=3 y=5 ---> y = 3x - 4
x=4 y=7 ---> y = 2x - 1
x=5 y=9 ---> y = x + 4
x=6 y=11 ---> y = 2x - 1
4) a) P = 2x - 1 + x + [1 + 2x - (2x - 1)] + x + 1 + 2x + 2x
P = 3x - 1 + [1 + 2x - 2x + 1] + 5x + 1
P = 8x + 2
A = 2x . (1 + 2x) - {x[(1 + 2x) - (2x - 1)]}
A = 2x + 4x² - {x[1 + 2x - 2x + 1]}
A = 2x + 4x² - {x . 2}
A = 4x²
b) x=2cm P = 8 . 2 + 2 = 16 + 2 = 18cm
A = 4 . 2² = 4 . 4 = 16cm²
x=3cm P = 8 . 3 + 2 = 24 + 2 = 26cm
A = 4 . 3² = 4 . 9 = 36cm²
x=5cm P = 8 . 5 + 2 = 40 + 2 = 42cm
A = 4 . 5² = 4 . 25 = 100cm²
x=10cm P = 8 . 10 + 2 = 80 + 2 = 82cm
A = 4 . 10² = 4 . 100 = 400cm²
x=20cm P = 8 . 20 + 2 = 160 + 2 = 162cm
A = 4 . 20² = 4 . 400 = 1600cm²
x=70cm P = 8 . 70 + 2 = 560 + 2 = 562cm
A = 4 . 70² = 4 . 4900 = 19600cm²
x=2 y=4 ---> y = 2x
x=3 y=5 ---> y = x + 2
x=4 y=6 ---> y = 2x + 2
b) x=0 y=0 ---> y = 3x
x=1 y=3 ---> y = 2x + 1
x=2 y=6 ---> y = 2x + 2
x=3 y=9 ---> y = 2x + 3
c) x=3 y=5 ---> y = 3x - 4
x=4 y=7 ---> y = 2x - 1
x=5 y=9 ---> y = x + 4
x=6 y=11 ---> y = 2x - 1
4) a) P = 2x - 1 + x + [1 + 2x - (2x - 1)] + x + 1 + 2x + 2x
P = 3x - 1 + [1 + 2x - 2x + 1] + 5x + 1
P = 8x + 2
A = 2x . (1 + 2x) - {x[(1 + 2x) - (2x - 1)]}
A = 2x + 4x² - {x[1 + 2x - 2x + 1]}
A = 2x + 4x² - {x . 2}
A = 4x²
b) x=2cm P = 8 . 2 + 2 = 16 + 2 = 18cm
A = 4 . 2² = 4 . 4 = 16cm²
x=3cm P = 8 . 3 + 2 = 24 + 2 = 26cm
A = 4 . 3² = 4 . 9 = 36cm²
x=5cm P = 8 . 5 + 2 = 40 + 2 = 42cm
A = 4 . 5² = 4 . 25 = 100cm²
x=10cm P = 8 . 10 + 2 = 80 + 2 = 82cm
A = 4 . 10² = 4 . 100 = 400cm²
x=20cm P = 8 . 20 + 2 = 160 + 2 = 162cm
A = 4 . 20² = 4 . 400 = 1600cm²
x=70cm P = 8 . 70 + 2 = 560 + 2 = 562cm
A = 4 . 70² = 4 . 4900 = 19600cm²
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