document.write( "Question 46613: This is not from a book, it's from my teacher.
\n" ); document.write( "I've been trying to get this right, but I know it's wrong.
\n" ); document.write( "My teacher wants this:
\n" ); document.write( "On a four quadrent grid, the following formulas: \r
\n" ); document.write( "\n" ); document.write( "y= mx+b
\n" ); document.write( " (y2-y1)
\n" ); document.write( "m= --------
\n" ); document.write( " (x2-x1)
\n" ); document.write( "A point consists of (x,y)
\n" ); document.write( "Two points are written like (x1, y1), (x2, y2)
\n" ); document.write( "And equations of the lines for those points.\r
\n" ); document.write( "\n" ); document.write( "Does this make any sense to anyone?
\n" ); document.write( "Thank you in advance for any help you can offer.
\n" ); document.write( "Holly \n" ); document.write( "
Algebra.Com's Answer #30881 by adamchapman(301)\"\" \"About 
You can put this solution on YOUR website!
The four quadrant grid is just a normal square grid like the one below:
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-5%2C+5%2C+-10%2C+10%2C+0%29+\"
\n" ); document.write( "Each of the squares in the top left, top right, bottom left and bottom right corners are called quadrants.
\n" ); document.write( "The eqautaion \"y=-mx%2Bb\" is the equation of a straight line. \"m\" is the gradient of that line, and \"b\" is the y-axis intercept. The y-axis intercept is the value of y when x=0.
\n" ); document.write( "Try to remember this equation: \"%28y-y%5B1%5D%29%2F%28y%5B2%5D-y%5B1%5D%29=%28x-x%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\"
\n" ); document.write( "where (x1,y1) and (x2,y2) are points on the line. It is an EXTREMELY important equation.
\n" ); document.write( "Lets do an example:
\n" ); document.write( "(x1,y1)=(1,2)
\n" ); document.write( "(x2,y2)=(3,4)
\n" ); document.write( "substitute these values into \"%28y-y%5B1%5D%29%2F%28y%5B2%5D-y%5B1%5D%29=%28x-x%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\":
\n" ); document.write( "\"%28y-2%29%2F%284-2%29=%28x-1%29%2F%283-1%29\" and then rearrange to give y in terms of x:
\n" ); document.write( "\"%28y-2%29%2F2=%28x-1%29%2F2\"
\n" ); document.write( "\"y=x%2B1\"
\n" ); document.write( "so comparing with \"y=mx+b\", m=1 and b=1.\r
\n" ); document.write( "\n" ); document.write( "I hope this helps,
\n" ); document.write( "Adam.
\n" ); document.write( "P.S. please check out my website, it may be helpful to you:
\n" ); document.write( "http://www.geocities.com/quibowibbler\r
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