How do you graph #y = -9x - 4#?

Question

3680 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-08-27T01:25:48

See a solution process below:

First, solve for two points which solve the equation and plot these points:

First Point:

For #x = 0#

#y = (-9 * 0) - 4#

#y = 0 - 4#

#y = -4# or #(0, -4)#

Second Point:

For #x = -1#

#y = (-9 * -1) - 4#

#y = 9 - 4#

#y = 5#or #(-1, 5)#

We can next graph the two points on the coordinate plane:

graph{(x^2+(y+4)^2-0.075)((x+1)^2+(y-5)^2-0.075)=0 [-20, 20, -10, 10]}

Now, we can draw a straight line through the two points to graph the equation:

graph{(y+9x+4)(x^2+(y+4)^2-0.075)((x+1)^2+(y-5)^2-0.075)=0 [-20, 20, -10, 10]}