document.write( "Question 302039: Here's another accuplacer practice question that I have no clue about: \"write the slope intercept form of the equation (-2,0)and (7,4). The answer that lights up correct is Y=4/9x + 8/9. Can someone tell me why this is correct, and in general , how to write slope intercept forms? Thanks lots. \n" ); document.write( "
Algebra.Com's Answer #216637 by scott8148(6628)\"\" \"About 
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general slope-intercept is ___ y = mx + b ___ where \"m\" is the slope and \"b\" is the y-intercept
\n" ); document.write( "___ the y-intercept is the value of \"y\" where the line crosses the y-axis (\"x\" is zero at this point)\r
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\n" ); document.write( "\n" ); document.write( "start by finding the slope ___ the change in \"y\", divided by, the change in \"x\"\r
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\n" ); document.write( "\n" ); document.write( "m = (4 - 0) / (7 - -2) = 4/9\r
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\n" ); document.write( "\n" ); document.write( "use the general equation, and substitute one of the points to find \"b\"\r
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\n" ); document.write( "\n" ); document.write( "y = (4/9)x + b ___ 4 = (4/9)7 + b ___ 4 = (28/9) + b ___ 8/9 = b\r
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\n" ); document.write( "\n" ); document.write( "so the slope-intercept equation is ___ y = (4/9)x + (8/9) \n" ); document.write( "
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