document.write( "Question 455384: I don't understand this one, can someone help me?\r
\n" ); document.write( "\n" ); document.write( "find the slope, if it exists, of the line containing the pair of points (2,8) and (10,10)\r
\n" ); document.write( "\n" ); document.write( "the slope m= \n" ); document.write( "
Algebra.Com's Answer #312655 by oberobic(2304)\"\" \"About 
You can put this solution on YOUR website!
If you have 2 points, then you can draw a line.
\n" ); document.write( "(2,8) and (10,10)
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\n" ); document.write( "y = mx + b
\n" ); document.write( "m = change in y divided by change in x
\n" ); document.write( "change in y = 10-8 = 2
\n" ); document.write( "change in x = 10-2 = 8
\n" ); document.write( "m = 2/8, so
\n" ); document.write( "m = 1/4
\n" ); document.write( "y = 1/4*x + b
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\n" ); document.write( "How do we find b?
\n" ); document.write( "Well, we have 2 points, so use one of them.
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\n" ); document.write( "10 = 1/4*10 + b
\n" ); document.write( "Multiply through by 4 to get rid of denominator.
\n" ); document.write( "40 = 10 +4b
\n" ); document.write( "30 = 4b
\n" ); document.write( "4b = 30
\n" ); document.write( "b = 30/4
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\n" ); document.write( "So,
\n" ); document.write( "y = 1/4*x + 30/4
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\n" ); document.write( "\"graph%28500%2C500%2C-12%2C12%2C-12%2C12%2C1%2F4%2Ax%2B30%2F4%29\"
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