document.write( "Question 969411: Complete the equation for the linear function whose graph contains the point (7,8) and has a slope of -1.2
\n" ); document.write( "I need to understand how to work this problem to help my child with her math. \n" ); document.write( "

Algebra.Com's Answer #592320 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
Complete the equation for the linear function whose graph contains the point (7,8) and has a slope of -1.2
\n" ); document.write( "------
\n" ); document.write( "Form of the equation: y = mx + b
\n" ); document.write( "---
\n" ); document.write( "You are given that y = 8 when x = 7.
\n" ); document.write( "And you are given that m = -1.2
\n" ); document.write( "-----
\n" ); document.write( "Substitute for those letters and solve for \"b\"::
\n" ); document.write( "8 = -1.2*7 + b
\n" ); document.write( "8 = -8.4 + b
\n" ); document.write( "b = 8 + 8.4 = 16.4
\n" ); document.write( "------
\n" ); document.write( "The answer you want is::
\n" ); document.write( "y = -1.2x + 16.4
\n" ); document.write( "----
\n" ); document.write( "Hope that helps.
\n" ); document.write( "---------
\n" ); document.write( "If your son/daughter says \"That is not the
\n" ); document.write( "way we do it in class\", let me know, as there
\n" ); document.write( "are several methods being taught these days.
\n" ); document.write( "------------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "------------------- \n" ); document.write( "

\n" );