Explanation
Correct answer: A.
Choice A is correct. When a graph is translated up units, each point on the resulting graph is units above the point on the original graph. In other words, the y-value of each point on the graph increases by . The graph shown passes through the points , , and . It follows that when the graph shown is translated up units, the resulting graph will pass through the points , , and . These points are , , and , respectively. Of the given choices, only the graph in choice A passes through the points , , and .
Desmos solution:
Note: The original function is entered as f(x) and the translated version as f(x)+4. The vertex of the translated graph is at (2,2), matching choice A.
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice B
Choice B is incorrect. This is the result of translating the graph down, rather than up, units.
Choice C
Choice C is incorrect. This is the result of translating the graph left, rather than up, units.
Choice D
Choice D is incorrect. This is the result of translating the graph right, rather than up, units.