Question 182892
Graph the equation: 750x + 150y = 500 for x values from minus ten to plus ten. Show steps and explain
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Solve for y:

{{{750x + 150y = 500}}}

Substitute {{{x=-10}}}

{{{750x + 150y = 500}}}
{{{750(-10) + 150y = 500}}}
{{{-7500 + 150y = 500}}}
{{{150y = 500+7500}}}
{{{y = 500/150+ 7500/150}}}
{{{y=8000/150}}}
{{{y=160/3}}}
{{{y=53&1/3}}}

So at one end we have the point 

{{{  matrix(1,4, "(" ,"-10," ,53&1/3,")" ) }}}


Substitute {{{x=10}}}

{{{750x + 150y = 500}}}
{{{750(10) + 150y = 500}}}
{{{7500 + 150y = 500}}}
{{{150y = 500-7500}}}
{{{y = 500/150-7500/150}}}
{{{y=-7000/150}}}
{{{y=-140/3}}}
{{{y=-46&2/3}}}

So at the other end we have the point 

{{{  matrix(1,4, "(" ,"10," ,-46&2/3,")" ) }}} 

{{{graph(200,200,-10,11,-60,60,(500-750x)/150)}}}

Edwin</pre>