document.write( "Question 1190001: Find the average rate of change of f (x)=-x^2+2x+9 from x=-3 to x=1. \n" ); document.write( "

Algebra.Com's Answer #821540 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "Find the average rate of change of f (x)=-x^2+2x+9 from x=-3 to x=1.
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document.write( "Calculate f(1) and f(-3).\r\n" );
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document.write( "    f(1) = -1^2 + 2*1 + 9 = -1 + 2 + 9 = 10;\r\n" );
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document.write( "    f(-3) = - (-3)^2 + 2*(-3) + 9 = -9 - 6 + 9 = -6.\r\n" );
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document.write( "Now  the average rate of change of  f(x)  from x=-3 to x=1  is\r\n" );
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document.write( "     =  =  = 4.    ANSWER\r\n" );
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