Question 148182
y = 3x 


(0, ____) (-1,____) (7,____) 



0, -1, and 7 represent x values.  To find the corresponding y values, simply plug in those values for x into the original equation.


1. Start with {{{y = 3x}}}

 
Plug in 0 {{{y=3(0)}}}


Simplify {{{y=0}}} So when x=0, y=0.  (0,0)



2. Start with {{{y = 3x}}}


plug in -1 {{{y=3(-1)}}}


Simplify {{{y=-3}}} So when x=-1, y=3. (-1,-3)



3. Start with {{{y = 3x}}}


Plug in 7 {{{y=3(7)}}}


Simplify {{{y=21}}} So when x=7, y=21. (7,21)




Solutions: (0,0) (-1,-3) (7,21)