document.write( "Question 368730: What are the x and y intercepts of the graph 4x - 7y = 14? Can you show me step by step how you solved this? \n" ); document.write( "
Algebra.Com's Answer #262735 by neatmath(302)![]() ![]() You can put this solution on YOUR website! It is fairly simple to find the x and y intercepts of a line. \r \n" ); document.write( "\n" ); document.write( "To find the y intercept, just set x equal to zero and solve for y! \r \n" ); document.write( "\n" ); document.write( "4(0)-7y=14 \r \n" ); document.write( "\n" ); document.write( "-7y=14 \r \n" ); document.write( "\n" ); document.write( "y=-2 \r \n" ); document.write( "\n" ); document.write( "Thus the y intercept is -2, or more precisely, the point (0,-2) \r \n" ); document.write( "\n" ); document.write( "You might have guessed by now, \r \n" ); document.write( "\n" ); document.write( "to find the x intercept, just set y equal to zero and solve for x! \r \n" ); document.write( "\n" ); document.write( "4x-7(0)=14 \r \n" ); document.write( "\n" ); document.write( "4x=14 \r \n" ); document.write( "\n" ); document.write( "x=7/2 \r \n" ); document.write( "\n" ); document.write( "Thus the x intercept is 7/2, or more precisely, the point (7/2,0) \r \n" ); document.write( "\n" ); document.write( "The easiest way to find the y intercept is to put the equation into slope intercept form or y=mx+b where m is the slope of the line and b is the y intercept! \r \n" ); document.write( "\n" ); document.write( "Thus, \r \n" ); document.write( "\n" ); document.write( "4x-7y=14 \r \n" ); document.write( "\n" ); document.write( "4x-14=7y \r \n" ); document.write( "\n" ); document.write( "7y=4x-14 \r \n" ); document.write( "\n" ); document.write( "y=4/7(x)-2 \r \n" ); document.write( "\n" ); document.write( "Notice how we get the b to end up equaling -2, which is exactly what we figured out above! \r \n" ); document.write( "\n" ); document.write( "By the same token, we also now know the slope of the line, 4/7. \r \n" ); document.write( "\n" ); document.write( "I hope this helps! \n" ); document.write( " |