document.write( "Question 160420This question is from textbook saxon algebra 2
\n" ); document.write( ": Write a function that represents the data set (-4, 9), (0, 1), (1, -1), (3, -5),
\n" ); document.write( "(4, -7). \n" ); document.write( "
Algebra.Com's Answer #118359 by ankor@dixie-net.com(22740)\"\" \"About 
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Write a function that represents the data set (-4, 9), (0, 1), (1, -1), (3, -5),
\n" ); document.write( "(4, -7).
\n" ); document.write( "Assuming this is linear, use the 1st and last coordinates to find the slope:
\n" ); document.write( "x1=-4; y1=9
\n" ); document.write( "x2=+4; y2=-7
\n" ); document.write( ":
\n" ); document.write( "The slope formula: m = \"%28%28y2-y1%29%29%2F%28%28x2-x1%29%29\"
\n" ); document.write( "Find the slope:
\n" ); document.write( "m = \"%28%28-7+-+9%29%29%2F%28%284+-%28-4%29%29%29\" = m = \"%28%28-7+-+9%29%29%2F%28%284+%2B+4%29%29\"
\n" ); document.write( ":
\n" ); document.write( "m = \"%28-16%29%2F%288%29\" = -2
\n" ); document.write( ":
\n" ); document.write( "Use the slope intercept formula: y - y1 = m(x - x1)
\n" ); document.write( "y - 9 = -2(x - (-4))
\n" ); document.write( ":
\n" ); document.write( "y - 9 = -2(x + 4)
\n" ); document.write( ":
\n" ); document.write( "y - 9 = -2x - 8
\n" ); document.write( ":
\n" ); document.write( "y = -2x - 8 + 9
\n" ); document.write( ":
\n" ); document.write( "y = -2x + 1
\n" ); document.write( "or
\n" ); document.write( "f(x) = -2x + 1
\n" ); document.write( ":
\n" ); document.write( "You can check and see if this fits the data set
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