Math Is Fun Forum

atut

Member

Registered: 2008-04-23

Posts: 30

Help I Got A Range Of Questions!

Which is an equation of the line that passes through point (3,5) and is parallel to the x-axis?

x=3
y=3
x=5
y=5

If point R' (6,3) is the image of R(2,1) under a dilation with respect to the origin, what is the constant of the dilation?

2
3
1
6

Which equation represents the axis of symmetry of the graph of the equation ywhich is(X)squared - 4x - 12?

x=2
y=-2
y=4
x=-4

                              Plz Help
Atu:D:);)

Last edited by atut (2008-05-13 05:33:57)

orcared

Member

Registered: 2008-07-12

Posts: 6

Re: Help I Got A Range Of Questions!

(1)
Both lines x = 5 and y = 5 pass through (3,5)

(2)
As 6/2 = 3 and 3/1 =3
So the constant of the dilation is c = 3

(3)

So

is the axis of symmetry of the graph

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