graph the function for the given domain. y=2x D:{ -2,0,2,4}

Knowing that y=2x is a linear equation, the only problem is tackling the domain. 

The domain represents the max/min values that x can. The range does the same for y values. 

Since the maximum domain value is 4 and the minimum is -2, be sure to only graph the segments on your graph between those x values. 

Hope I helped :)