The graph which shows a rate of change of 1/2 is the linear graph shown in the image attached below.
What is the Rate of Change?
Rate of change = change in y / change in x.
The two points between -4 and 0 on the x-axis as shown in the diagram attached are, (-4, 1) and (0, 3). It is also a linear graph.
Rate of change = (3 - 1)/(0 -(-4)) = 2/4 = 1/2
The graph that shows a rate of change is the linear graph attached below.
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