someone Please help

The variable Z is directly proportional to X. When X is 6, Z has the value 18.
What is the value of Z when X = 10

Question

someone Please help 

The variable Z is directly proportional to X.  When X is 6, Z has the value 18.
What is the value of Z when X = 10

robtobey2 · Answer

http://www.thefreedictionary.com/constant+of+proportionality

dragontears1128 · Answer

?

dragontears1128 · Answer

does it equal 30

dragontears1128 · Answer

@robtobey2

slenderman · Answer

ok so looking at that what i would suggest is to make a table of sorts, and knowing the base values unless given extra information just assume that the relationship is Z=3X

shadowlegendx · Answer

The variable Z is directly proportional to X.  When X is 6, Z has the value 18.
What is the value of Z when X = 10

$$\frac{ 6 }{ 10 }  =\frac{ 18 }{ a }$$

shadowlegendx · Answer

When x = 6
z = 18

when x = 10
z = a

solve for a

shadowlegendx · Answer

Cross multiply 

6a = 180

Divide by 6

a = 30

shadowlegendx · Answer

When x = 6
z = 18

when x = 10
z = 30

shadowlegendx · Answer

It's almost like a conversion key.

3 is the magical number.