SOLUTION: Graph f(x) = –x – 2. Please help me with this. I dont understand these at all..

Algebra ->  Algebra  -> Trigonometry-basics -> SOLUTION: Graph f(x) = –x – 2. Please help me with this. I dont understand these at all..      Log On

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

Question 103096: Graph f(x) = –x – 2.
Please help me with this. I dont understand these at all..
Answer by Fombitz(13823) About Me  (Show Source):
You can put this solution on YOUR website!
f(x) = –x – 2.
A function is just a formula where you put a number in and get a number out. Let's generate some values.
For x=0, f(0)= -0-2=-2
For x=1, f(1)= -1-2=-3
For x=2, f(1)= -2-2=-4
Let's do some negative values too.
For x=-1, f(1)= -(-1)-2=-1
For x=-2, f(1)= -(-2)-2=0
Now we have pairs of points (x,y) that describe this function. A grid define the x axis as the horizontal axis and y axis as vertical axis. Plot points on the grid to make your graph.
Let point A be (0,-2)
drawing%28+300%2C+300%2C+-5%2C+5%2C+-5%2C+5%2Cgrid%28+1+%29%2Ccircle%28+0%2C+-2%2C+.2+%29%2Clocate%28+.%0D%0A75%2C+-1.2%2CA++%29%2C+circle%28+1%2C+-3%2C+.2%29%2Ccircle%28+2%2C+-4%2C+.2+%29%2Ccircle%28+-1%2C+-1%2C+.2+%29%2Ccircle%28+-2%2C+0%2C+.2+%29%29
Then draw a line to connect all the points. Actually your function would continue in a straight line to the edges of your graph paper.
drawing%28+300%2C+300%2C+-5%2C+5%2C+-5%2C+5%2Cgrid%28+1+%29%2Ccircle%28+0%2C+-2%2C+.2+%29%2Ccircle%28+1%2C+-3%2C+.2%29%2Ccircle%28+2%2C+-4%2C+.2+%29%2Ccircle%28+-1%2C+-1%2C+.2+%29%2Ccircle%28+-2%2C+0%2C+.2+%29%2Cline%28-5%2C3%2C5%2C-7%29%29