# Why is #y=2x-1# not a direct variation?

##### 1 Answer

Mar 16, 2018

#### Explanation:

#"the equation representing direct variation is"#

#•color(white)(x)y=kxlarrcolor(blue)"k is the constant of variation"#

#"which means it passes through the origin"#

#y=2x-1" is not in this form so does not represent "#

#"direct variation"#