Converting Parabolic Equations Page 3
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3Create a quadratic equation in vertex form using the given information
13)
Vertex at origin, Focus (0, -1/32)
14)
Vertex at origin, Directrix x=-1/8
15)
Vertex at (-8, -9), Focus (-31/4, -9)
16)
Vertex at (8, -1), Directrix y = 0
Answers to exercises
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2
2
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1) y-2=3x
2) x=(y-8)
3) y-4=(x+3)
4) x+1=-4(y-7)
5) y+3=1/5(x-10)
6) x-2=1/3(y+4)
2
2
2
2
2
2
7) y = x
-2
8) x = -3y
+30y-75
9) y = x
+16x+65
10) y = 6x
+36x+45
11) y = 4x
-36x+74
12) x =-1/5y
-4x-17
2
2
2
2
y = -8x
x = 2y
x+8=(y+9)
y+1=-1/4(x-8)
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