document.write( "Question 839761: The equation of the axis of symmetry of the graph of a quadratic function is x= 3. The graph passes through the points R(3, 7) and T(-1, -25). Determine an equation of the function. \n" ); document.write( "

Algebra.Com's Answer #505843 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"f%28x%29=a%28x-3%29%5E2%2Bb\"$
\n" ); document.write( " $\"f%283%29=a%283-3%29%5E2%2Bb=0%2Bb=7\"$
\n" ); document.write( " $\"b=7\"$
\n" ); document.write( " $\"f%28-1%29=a%28-1-3%29%5E2%2B7=-25\"$
\n" ); document.write( " $\"a%28-4%29%5E2%2B7=-25\"$
\n" ); document.write( " $\"16a%2B7=-25\"$
\n" ); document.write( " $\"16a=-32\"$
\n" ); document.write( " $\"a=-2\"$
\n" ); document.write( " $\"highlight_green%28f%28x%29=-2%28x-3%29%5E2%2B7%29\"$ \n" ); document.write( "

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