algebra
posted by Marissa
1)Write an equation for the parabola with focus (1,3)and vertex(0,3)
answer= x= 1/4(y3)^2
2)Write an equation for a circle if the endpoints of a diameter are at (1,1)and(1,9)
answer= (x1)^2+(y+4)^2=25
3)Which is the equation of a circle with center (0,1)and radius 2 units?
answer= x^2+y^22y=4
1) correct for the vertex but I don't know about the focus
2) wrong ( I again plugged your equation into my calculator and I didn't get the diameter as what was given)
3) correct
what do you mean?
for number 2
A.(x1)^2+(y+4)^2=5
C.(x+1)^2+(y4)^2=5
D.(x+1)^2+(y4)^2=25
is it A?
number 1
A.y=(x4)^215
B.y=4(x1)^2+5
C.y=4(x1)^23
Checking again..2 is fine
I was looking on the wrong side of the circle for the diameter points.
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