Welcome :: Homework Help and Answers :: Mathskey.com

Recent Visits

  
Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

13,435 questions

17,804 answers

1,438 comments

774,963 users

Graph the linear equation. Find three points that solve the equation, then plot them on the graph 3x-4y= -18

0 votes
Graph the linear equation. Find three points that solve the equation, then plot them on the graph
3x-4y= -18.
asked Mar 13, 2014 in PRE-ALGEBRA by angel12 Scholar

1 Answer

0 votes

Write the equation in slope-intercept form y = mx + b , where m is slope and b is y -intercept.

The equation is 3x - 4y = -18

Subtract 3x from each side.

-4y = - 3x - 18

Divide each side by negitive 4.

y = - 3x/-4 -18/-4

y = 3x/4 + 4.5

Compare the equation with slope-intercept form y = mx + b .

slope = 3/4 and y -intercept is 4.5.

y -intercept is 4.5, so the line crosses the y -axis at (0, 4.5)

Using slope find the next  points.

Slope = rise/run = 3/4

Slope = 3/4 and y -intercept is 4.5.

Start at point (0 , 4.5), move 3 units up and 4 units right, then plot the point (4 , 7.5).

To find third point

Slope = rise/run = -3/-4

Slope = -3/-4 and y -intercept is 4.5.

Start at point (0 , 4.5), move 3 units down and 4 units left, then plot the point (-4 , 1.5).

Draw a line through these points.

Graph :

graph for the equation - x - 2y = 8

answered Mar 15, 2014 by ashokavf Scholar
edited Mar 15, 2014 by ashokavf

Related questions

asked Aug 21, 2014 in ALGEBRA 2 by anonymous
...