document.write( "Question 75416This question is from textbook Prentice Hall Pre Algebra California Edition
\n" ); document.write( ": Hi.
\n" ); document.write( "What does it mean when the directions say, ''Identify the slope and y-intercept of the graph of each equation''?
\n" ); document.write( "I would like to know if you can explain it any better.
\n" ); document.write( "Thank you!
\n" ); document.write( "Also, I was wondering if you could help me solve this problem out:
\n" ); document.write( "Graph the equation y=-x \n" ); document.write( "

Algebra.Com's Answer #54101 by Edwin McCravy(20059) $\"\"$ $\"About$

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document.write( "Hi.\r\n" );
document.write( "What does it mean when the directions say,\r\n" );
document.write( "''Identify the slope and y-intercept of the graph of each \r\n" );
document.write( "equation''? I would like to know if you can explain it \r\n" );
document.write( "any better.\r\n" );
document.write( "Thank you!\r\n" );
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document.write( "Here's a way that always works:\r\n" );
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document.write( "1. Find the number on the x-axis where the graphed line \r\n" );
document.write( "   crosses it. Call that number a. [a is the x-intercept]\r\n" );
document.write( "2. Find the number on the y-axis where the graphed line \r\n" );
document.write( "   crosses it. Call that number b. {b is the y-intercept]\r\n" );
document.write( "3. Make the fraction b/a and simplify if possible.\r\n" );
document.write( "4. Change the sign of that.  That's the slope.\r\n" );
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document.write( "Example 1.\r\n" );
document.write( "Look at the graph of this line:\r\n" );
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document.write( "1. The number on the x-axis where the graphed line \r\n" );
document.write( "   crosses it is 2.\r\n" );
document.write( "2. The number on the y-axis where the graphed line \r\n" );
document.write( "   crosses it is -3. \r\n" );
document.write( "3. Make the fraction -3/2\r\n" );
document.write( "4. Change the sign of that to +3/2.  That's the slope!\r\n" );
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document.write( "Example 2.\r\n" );
document.write( "Look at the graph of this line:\r\n" );
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document.write( "1. The number on the x-axis where the graphed line \r\n" );
document.write( "   crosses it is +8.\r\n" );
document.write( "2. The number on the y-axis where the graphed line \r\n" );
document.write( "   crosses it is +4.\r\n" );
document.write( "3. Make the fraction (+4)/(+8) and that simplifies to 1/2.\r\n" );
document.write( "4. Change the sign of that to -1/2.  That's the slope!\r\n" );
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document.write( "Also, I was wondering if you could help me solve this \r\n" );
document.write( "problem out:\r\n" );
document.write( "Graph the equation y = -x\r\n" );
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document.write( "1. Find at least two points following these rules.\r\n" );
document.write( "   It's a good idea to find a third point as a check \r\n" );
document.write( "   to see if all three line up.\r\n" );
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document.write( "   A. Arbitrarily pick some value (number) and a \r\n" );
document.write( "      letter either x or y.\r\n" );
document.write( "   B. Substitute that value you picked for the letter \r\n" );
document.write( "      you picked, and solve for value of the other \r\n" );
document.write( "      letter.\r\n" );
document.write( "   C. Make the ordered pair (x-value, y-value)\r\n" );
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document.write( "2. Plot them.\r\n" );
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document.write( "   A. I arbitrarily pick the value -2 and the letter y.\r\n" );
document.write( "   B. I substitute -2 for y in \r\n" );
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document.write( "                  y = -x\r\n" );
document.write( "                 -2 = -x\r\n" );
document.write( "                  2 = x\r\n" );
document.write( "   C. I make the ordered pair (2,-2)  \r\n" );
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document.write( "   A. I arbitrarily pick the value 0 and the letter y.\r\n" );
document.write( "   B. I substitute 0 for y in \r\n" );
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document.write( "                  y = -x\r\n" );
document.write( "                  0 = -x\r\n" );
document.write( "                  x = 0\r\n" );
document.write( "   C. I make the ordered pair (0,0)\r\n" );
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document.write( "   A. I arbitrarily pick the value 3 and the letter x.\r\n" );
document.write( "   B. I substitute 3 for x in \r\n" );
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document.write( "                  y = -x\r\n" );
document.write( "                  y = -3\r\n" );
document.write( "                 \r\n" );
document.write( "   C. I make the ordered pair (3,-3)\r\n" );
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document.write( "I plot them and draw a line through them:\r\n" );
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document.write( "  \r\n" );
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document.write( "Edwin

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