Determine whether y varies directly with x. If so, find the constant of variation k and write the equation.

x y
6 24
18 72
54 216
162 648

Question

Determine whether y varies directly with x. If so, find the constant of variation k and write the equation.


x      y
6      24
18    72
54    216
162   648

anonymous · Answer

Do you know what direct variation means?

anonymous · Answer

no

anonymous · Answer

here are the answers  tho

yes; k = 4; y = 4x
yes; k = 3; y = 3x
yes; k = 6; y = 6x
no

anonymous · Answer

It means that one variable must vary direct with another variable.
In other words, when a increases by a factor of x, then b has to increase by a factor of x too.

anonymous · Answer

so when a1 = y and b1 = z, and a2 = 3*a1, then b2 must be 3*b1

anonymous · Answer

so basically just times x by either 4,3,6? to see if it comes out to y?

anonymous · Answer

Not quite, but you're getting there

anonymous · Answer

I will try to draw it

anonymous · Answer

oh ohkaii.

anonymous · Answer

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