Let f and g be functions. If the graph of g is obtained from the graph of f by translating the graph of f two units to the left, which of the following gives the relationship between f(x) and g(x) ?A.g(x) = f(x) - 2B.g(x) = f(x) + 2C.g(x) = f(x - 2)D.g(x) = f(x + 2)
Question
Let f and g be functions. If the graph of g is obtained from the graph of f by translating the graph of f two units to the left, which of the following gives the relationship between f(x) and g(x) ?A.g(x) = f(x) - 2B.g(x) = f(x) + 2C.g(x) = f(x - 2)D.g(x) = f(x + 2)
Solution
The correct answer is D. g(x) = f(x + 2)
Here's why:
When we translate a graph to the left by two units, we are effectively shifting all the x-values of the original function, f(x), by two units to the left. This means that for any given x-value on the graph of g, we are looking at the y-value that corresponds to the x-value that is two units to the right on the graph of f.
In other words, for any x, the value of g(x) is equal to the value of f at x + 2. Hence, g(x) = f(x + 2).
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