Question 1001961

A linear equation is an equation for a {{{straight}}}{{{ line}}}.

answer is B.	{{{y = 2x}}}

{{{ graph( 600, 600, -10, 10, -10, 10,2x) }}}

other options are not linear equations because their graph is not a {{{straight}}}{{{ line}}}

see the graphs:

A.	{{{y = abs(x)}}}

{{{ graph( 600, 600, -10, 10, -10, 10,abs(x)) }}}

C.	{{{y = x^2}}}

{{{ graph( 600, 600, -10, 10, -10, 10,x^2) }}}


 the variables (like "{{{x}}}" or "{{{y}}}") in Linear Equations do {{{NOT}}} have:

    exponents (like the {{{2}}} in {{{x^2}}})
    or square roots (like {{{abs(x)=sqrt(x^2)}}}, cube roots, etc