Question 626041
Plot the following straight line graph:

-5x - 15y = 15

Add 5x to each side of the equation.

-5x - 15y + 5x = 15 + 5x

Combine like terms:

-5x + 5x = 0

We now have:

-15y = 15 + 5x

Divide each item by 5

-15y/5 = 15/5 + 5x/5

-3y = 3 + x or

-3y = x + 3

Divide each item by -3

-3y/-3 = x/-3 + 3/-3

y = -1x/3 - 1


From the above we get the following coordinates for x and y.

(-6,1)

(-3,0)

(0,-1)

(3,-2)

(6,-3)


Plotting the above graph:

x-intercept = -3 and

y-intercept = -1


The Slope (m) = rise/run = -2/6 = -1/3

Slope (m) = -1/3


The other method:

(y2 - y1)/(x2 - x1)

= -3 - (-2) / 6 - 3

= -3 - (-2) = -3 + 2 = -1

= 6 - 3 = 3

Slope (m) = -1/3


The equation of the straight line is:

y = -1x/3 - 1


Sorry I don't have the graph software to use here. I hope the above information will help you plot the graph.



obuong3@aol.com