<PRE><B>Question 67023</B>
Graph the functions: f(x) = -2x - 5.
:
y = f(x)
:
y = -2x - 5
:
Choose some values for x. Substitute for x in the equation and solve for y.
Good range is from -3 to + 3. Since it is a linear equation (a straight line), 
two plots will do, however a third plot will point out a mistake and more will
give you some practice.
:
Here is x = -3 as an example:
y = -2x - 5
y = -2(-3)
y = +6 - 5
y = +1
:
Do the same for x = -1 to x = +3, the table should look like this
x | y
------
-3|+1
-1|-3
 0|-5
+1|-7
+2|-9
+3|-11
:
Plot these coordinates, choose a scale that will include all these values,
your graph should look like this:
{{{ graph( 300, 200, -8, 8, -12, 10, -2x - 5) }}}
:
Study this and see how the x|y coordinates agree with this graph and it will all
make sense to you. </PRE>