document.write( "Question 305899: write an equation for the parabola with vertex at (2, -1) and y-intercept 5 \n" ); document.write( "

Algebra.Com's Answer #218980 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Use the vertex form.
\n" ); document.write( " $\"y=a%28x-h%29%5E2%2Bk\"$
\n" ); document.write( "where (h,k) is the vertex.
\n" ); document.write( " $\"y=a%28x-2%29%5E2-1\"$
\n" ); document.write( "Now use the point (0,5) to solve for a.
\n" ); document.write( " $\"5=a%280-2%29%5E2-1\"$
\n" ); document.write( " $\"5=4a-1\"$
\n" ); document.write( " $\"4a=6\"$
\n" ); document.write( " $\"a=6%2F4=3%2F2\"$
\n" ); document.write( " $\"highlight%28y=%283%2F2%29%28x-2%29%5E2-1%29\"$
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