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Sketch the graph of each line?

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-3x=y+1 

asked Sep 11, 2014 in PRECALCULUS by anonymous

1 Answer

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The equation is - 3x = y + 1

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

- 3x = y + 1

Subtract 1 from each side.

y = - 3x - 1

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

slope = - 3 and y - intercept is - 1.

y - intercept is - 1, so the line crosses the y - axis at (0, - 1)

Using slope find the next point.

Slope = rise/run = - 3/1

Start at point (0, - 1), move 3 units down and 1 unit right, then plot the point (1, -4).

Draw a line through these points.

Graph :

graph for the equation - x - 2y = 8.

answered Sep 11, 2014 by david Expert

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