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krazyykay
30.04.2021 •
Mathematics
Write the equation of the parabola with the given focus
and directrix,
focus: (-2,3); directrix: the line y=7
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Ответ:
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
↑ ↑ ↑ ↑ ↑
1 2 3 4
As for the other plot, you have to think: How many times does 1 need to jump to get to 3?
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
↑ ↑ ↑
1 2
This is important to remember, the numbers to your right is your y and the numbers to your left is your x.
(-2, 3) (1, 1)
↑ ↑
y y
(-2, 3) (1, 1)
↑ ↑
x x
I hope I helped :)