document.write( "Question 321368: I need hlep findingthe y- and x-intercepts for the equation. Then graphing the equation 4y = -28 + 7x \n" ); document.write( "

Algebra.Com's Answer #230177 by josmiceli(19441) $\"\"$ $\"About$

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Since the equation is a straight line, it can only
\n" ); document.write( "intercept the y-axis at one point. It can only
\n" ); document.write( "intercept the x-axis at one point, also.
\n" ); document.write( "The key facts are:
\n" ); document.write( "The y-intercept occurs where $\"x+=+0\"$
\n" ); document.write( "The x-intercept occurs where $\"y+=+0\"$
\n" ); document.write( "given:
\n" ); document.write( " $\"4y+=+-28+%2B+7x\"$
\n" ); document.write( "Let $\"x+=+0\"$
\n" ); document.write( " $\"4y+=+-28+%2B+7%2A0\"$
\n" ); document.write( " $\"4y+=+-28\"$
\n" ); document.write( " $\"y+=+-7\"$ this is the y-intercept
\n" ); document.write( "Now let $\"y+=+0\"$
\n" ); document.write( " $\"4%2A0+=+-28+%2B+7x\"$
\n" ); document.write( " $\"7x+=+28\"$
\n" ); document.write( " $\"x+=+4\"$ this is the x-intercept
\n" ); document.write( "Here's a plot which shows the intercepts:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-10%2C+10%2C+-10%2C+10%2C+%287%2F4%29%2Ax+-+7+%29+\"$ \n" ); document.write( "

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