To identify which graph represents an exponential function, you should look for characteristics typical of exponential growth or decay, such as a curve that rapidly increases or decreases and does not form a straight line.
Since I cannot see the images you referred to, I will guide you on how to recognize an exponential function graph:
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Shape of the Graph: Exponential functions typically have a distinctive curve. For example, an exponential growth function (like \( f(x) = 2^x \)) will rise sharply to the right, while an exponential decay function (like \( f(x) = (1/2)^x \)) will fall sharply.
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Y-Intercept: Exponential functions will cross the y-axis at a point where \( x = 0 \), and that point's value will be the function's value at that x (usually \( f(0) = 1 \) for functions of the form \( f(x) = a^x \) when \( a > 0 \)).
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Behavior as \( x \) Tends to Infinity and Negative Infinity: As \( x \) increases, the function will show exponential growth (approaching infinity for growth) or decay (approaching zero for decay). As \( x \) decreases, it approaches zero (for growth) and can approach infinity negatively (unlikely, given positive bases) for decay.
To conclude, if you compare the described plots based on these points, the one that exhibits a clear upward or downward curve tending towards infinity or zero is likely the exponential graph. If you can provide details about the curves shown in each graph, I could help identify the correct one more directly.