document.write( "Question 530490: what is a rule for the function repersented by (o,-2),(1,-1),(2,2),(3,7)? Explain your reasoning. \n" ); document.write( "

Algebra.Com's Answer #350081 by josmiceli(19441) $\"\"$ $\"About$

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It's not a straight line, so I'ii assume it's a
\n" ); document.write( "2nd degree equation in the form
\n" ); document.write( " $\"+y+=+ax%5E2+%2B+bx+%2B+c+\"$
\n" ); document.write( "(0,-2)
\n" ); document.write( " $\"+-2+=+0+%2B+0+%2B+c+\"$
\n" ); document.write( " $\"+c+=+-2+\"$
\n" ); document.write( "(1,-1)
\n" ); document.write( " $\"+-1+=+a+%2B+b+-2+\"$
\n" ); document.write( " $\"+a+%2B+b+=+1+\"$
\n" ); document.write( " $\"+b+=+1+-+a+\"$
\n" ); document.write( "(2,2)
\n" ); document.write( " $\"+2+=+4a+%2B+2b+-+2+\"$
\n" ); document.write( " $\"+4a+%2B+2b+=+4+\"$
\n" ); document.write( " $\"+2a+%2B+b+=+2+\"$
\n" ); document.write( "by substitution:
\n" ); document.write( " $\"+2a+%2B+1+-+a+=+2+\"$
\n" ); document.write( " $\"+a+=+1+\"$
\n" ); document.write( " $\"+b+=+0+\"$
\n" ); document.write( "The equation so far is
\n" ); document.write( " $\"+y+=+x%5E2+-+2+\"$ answer
\n" ); document.write( "Does it go through (3,7) ?
\n" ); document.write( " $\"+7+=+9+-+2+\"$ yes \n" ); document.write( "

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