SOLUTION: I am trying to graph a function and I understand how to solve it. What I do not understand is knowing what number to plot for example F(x)=-3x. I am not sure how to determine which

Click here to see ALL problems on Coordinate-system

Question 394630: I am trying to graph a function and I understand how to solve it. What I do not understand is knowing what number to plot for example F(x)=-3x. I am not sure how to determine which number I use to solve the formula. Please help I am failing this class. How do you determine what numbers to plug into the function I can graph it and solve it but do not understand what numbers to use.
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
I am trying to graph a function and I understand how to solve it. What I do not understand is knowing what number to plot for example F(x)=-3x. I am not sure how to determine which number I use to solve the formula.
---
Some numbers are easier to work with than other, but the
fact is you may choolse any numbers you want to.
---
An easy number to use is x= 0.
Then F(0) -3*0 = 0
So you have one point: (0,0)
----
Pick any other number you care to:
An easy number to use is x = 1.
Then F(1) = -3*1 = -3
So you have a 2nd point: (1,-3)
---
Plot those two points and draw a line thru them to get:

===============
Cheers,
Stan H.
===========