what is the function for Y=3x

Question

Graph the function for the given domain.

y = 2x D:{−4, −2, 0, 2}

Answer 1

Since the domain refers to the x values, you simply need to create a table of x and y values to graph this:

 

x      y (which is 2 times x)

-4    -8

-2    -4

0      0

2      4

 

So the points you are graphing are 

(-4,-8), (-2,-4), (0,0), and (2,4)

 

Hope that helps!