document.write( "Question 427014: Could someone show me how to write an equation from a graph when the line is vertical and in quad. 1,3 and intercepts x on -3 \n" ); document.write( "

Algebra.Com's Answer #296994 by stanbon(75887) $\"\"$ $\"About$

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Could someone show me how to write an equation from a graph when the line is vertical and in quad. 1,3 and intercepts x on -3
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\n" ); document.write( "It can't be vertical if it passes thru quadrants I and III.
\n" ); document.write( "It must have a slant, or slope.
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\n" ); document.write( "If it passes thru x = -3 you know the x-intercept but
\n" ); document.write( "not the y-intercept.
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\n" ); document.write( "So all you know is the form of the equation is y = mx + b
\n" ); document.write( "and (-3,0) satisfies the equation:
\n" ); document.write( "So, 0 = m(-3)+b
\n" ); document.write( "b = 3m
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\n" ); document.write( "m = -b/3
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\n" ); document.write( "The equation would be y = (-b/3)x + 3m
\n" ); document.write( "You would have to know \"m\" to get a final
\n" ); document.write( "form for the equation.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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