document.write( "Question 503418: Write the equation of the line that contains the indicated pair of points
\n" ); document.write( "(2,2)(5,8) \n" ); document.write( "

Algebra.Com's Answer #339227 by oberobic(2304) $\"\"$ $\"About$

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y = mx + b
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\n" ); document.write( "m = (change in y) / (change in x)
\n" ); document.write( "change in y = 8-2 = 6
\n" ); document.write( "change in x = 5-2 = 3
\n" ); document.write( "m = 6/3
\n" ); document.write( "m = 2
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\n" ); document.write( "y = 2x + b
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\n" ); document.write( "Substitute (2,2)
\n" ); document.write( "2 = 4 + b
\n" ); document.write( "b = -2
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\n" ); document.write( "y = 2x -2
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\n" ); document.write( "Check with the other point
\n" ); document.write( "2x -2 = ?
\n" ); document.write( "2(5) -2 = 10-2
\n" ); document.write( "10-2 = 8
\n" ); document.write( "Correct.
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\n" ); document.write( " $\"graph%28500%2C500%2C-10%2C10%2C-10%2C10%2C2%2Ax-2%29\"$ \n" ); document.write( "

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