1. y x
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2. y
The y - coordinate is always twice the x -coordinate for points on this line
(x,y) x
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3. y
The y - coordinate is always twice the x -coordinate for points on this line
(x,y) x
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4. y
The y - coordinate is always twice the x -coordinate for points on this line x
(x,y)
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5. y
y = 2x
is the equation of this line x
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6. y
What would the rule be between the x coordinate and the y coordinate so that we get a circle instead of a line x
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7. y 2 x + 2 y = 2 r
(x,y) r y x x
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8. y 2 x + 2 y = 2 r
(x,y) r y x x
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9. y 2 x + 2 y = 2 r
(x,y) r y x x
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10. y 2 x + 2 y = 2 r
(x,y) y r x x
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11. y 2 x + 2 y = 2 r
(x,y) r y x x
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12. y 2 x + 2 y = 2 r
(x,y) r y x x
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13. y 2 x + 2 y = 2 r
(x,y) r x y x
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14. y 2 x + 2 y = 2 r x x y r
(x,y)
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15. y 2 x + 2 y = 2 r x x y r
(x,y)
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16. y 2 x + 2 y = 2 r x x y r
(x,y)
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17. x y + r = 2 centre the origin (0,0) radius r
is the equation of a circle with:
centre the origin (0,0)
radius r
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18. x y + 16 = x y + 81 = x y + 20 = for example ... 4 9 20 ≈ 4.46
is a circle with centre at the origin and radius 2 x y + 81 = 9
is a circle with centre at the origin and radius 2 x y + 20 = 20
is a circle with centre at the origin and radius
≈ 4.46
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