Below are three expressions. Observe themn and spot their similarities and differences. (a) 3*-2 = 81 (b) y = 4* (c) 2 2 32 %3D Questions: 1. What is the similarity of (a), (b), and (c)? 2. What is the similarity of (a) and (c)? 3. How do (a) and (c) differ from (b)? 4. How are (a) and (b) similar to each other? 5. How do (a) and (b) differ from (c)? 6. Can you recall which among them is an exponential function? 7. Which among the three is/are exponential expression/s? As you have noticed, all the three givens are expressions involving variable as the exponent (a) and (c) both involve one variable only, while (b) involves the relationship between two variables. Nevertheless, (a) and (b) both use an equal sign. (b) however, it contains an inequality symbol. Recall that (b) is an exponential function since it shows the relation between dependent variable y and independent variable x. Nevertheless, all three are exponential expressions, including (a) and (c). It is so since all are expressions with a variable used as an exponent.