Question 94399
Question:


Can someone please help me. I do not know how to graph an equation like this one.
Graph f(x)=-2x+4


Answer.


If you want to graph the equation manually, you need to find our points.


For that give some arbitrary values for x and then find the corresponding values of f(x)


When , x = 0, then f(x) =  -2(0) + 4 = 0 + 4 = 4



When , x = 1, then f(x) =  -2(1) + 4 = -2 + 4 = 2



When , x = 2, then f(x) =  -2(2) + 4 = -4 + 4 = 0


When , x = 3, then f(x) =  -2(3) + 4 = -6 + 4 = -2


When , x = -1, then f(x) =  -2(-1) + 4 = 2 + 4 = 6


When , x = -2, then f(x) =  -2(-2) + 4 =  4 + 4 = 8


and so on....
now plot these values in a graph paper...



The the graph will come like this...



{{{ graph( 600, 600, -10, 10, -10, 10,-2x+4 ) }}}


Here you can see that the solution of this equation is x = {{{2}}}   

and y ={{{4}}} 



Hope you found the explanation useful.


Regards.


Praseena.