document.write( "Question 45452: write an equation in slopw-intercept form if possible of the line trough the pair of points (-7,9) and (-4,5) \n" ); document.write( "
Algebra.Com's Answer #30194 by tutorcecilia(2152)\"\" \"About 
You can put this solution on YOUR website!
First, I would find the slope of the line:
\n" ); document.write( "m = (y2-y1)/(x2-x1) = (5-9)/(-4-(-7))= -4/3
\n" ); document.write( ".
\n" ); document.write( "Use the slope-intercept formula (y=mx+b) to find the y-intercept(b).
\n" ); document.write( "Pick point (-7,9) and plug-in the values:
\n" ); document.write( "(9)=(-4/3)(-7)+ b
\n" ); document.write( "9 = 28/3 + b
\n" ); document.write( "9-28/3 = b
\n" ); document.write( "9/1-28/3=b
\n" ); document.write( "-1/3 = b
\n" ); document.write( ".
\n" ); document.write( "Plug the slope (m) and the y=intercept (b) into the formula y-mx+b:
\n" ); document.write( "y=(-4/3)x -1/3
\n" ); document.write( ".
\n" ); document.write( "Check the formula by plugging in one of the given points. Pick point (-7,9):
\n" ); document.write( "(9)=(-4/3)(-7) - 1/3
\n" ); document.write( "9=9 Checks out. \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );