document.write( "Question 124051: Can someone please help? I need to Graph the line y=3x-4 using the slope-intercept form of the line. What is the Y intercept and what is one other point on the line? \r
\n" );
document.write( "\n" );
document.write( "Thanks so much \n" );
document.write( "
Algebra.Com's Answer #91046 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Graph the line y = 3x - 4 using the slope-intercept form of the line. What is the Y intercept and what is one other point on the line? \n" ); document.write( ": \n" ); document.write( "The equation y = 3x - 4 is in the slope/intercept form \n" ); document.write( ": \n" ); document.write( "y intercept occurs when x = 0. If you substitute 0 for x in the above equation: \n" ); document.write( "y = 3(0) - 4 \n" ); document.write( "y = 0 - 4 \n" ); document.write( "y = -4, this is the y intercept, (pretty simple, right) \n" ); document.write( ": \n" ); document.write( "This point on the graph would be represented by the x,y values: 0, -4 \n" ); document.write( ": \n" ); document.write( "To plot a linear graph you need at least one more point. \n" ); document.write( "You can choose a value for x and find y for the 2nd point \n" ); document.write( ": \n" ); document.write( "Let's say x = +2, substitute 2 for x: \n" ); document.write( ": \n" ); document.write( "y = 3(2) - 4 \n" ); document.write( "y = 6 - 4 \n" ); document.write( "y = 2 \n" ); document.write( "; \n" ); document.write( "This point on the graph would be represented by the x,y values: 2, 2 \n" ); document.write( ": \n" ); document.write( "A short table of this \n" ); document.write( " x | y \n" ); document.write( "------- \n" ); document.write( " 0 |-4 \n" ); document.write( "+2 |+2 \n" ); document.write( ": \n" ); document.write( "Join these points on a graph and it should look like this: \n" ); document.write( " \n" ); document.write( "Notice that that it crosses (intercepts) the y axis at -4 \n" ); document.write( ": \n" ); document.write( "Did I make this understandable to you? \n" ); document.write( " \n" ); document.write( " |