Mathematics

Mathematics

Problem

Let g(x)=7(54)xg(x)=7\left(\dfrac{5}{4}\right)^{x}. a. (a) Find the exact value of g(2)g(2). b. (b) Evaluate g(−3)g(-3). c. (c) Calculate the percentage decrease when xx changes from 11 to −1-1. Give your answer correct to the nearest integer.
Intuitive explanation

This is an exponential function where the base 54\frac{5}{4} is greater than 1, so the function grows as xx increases. The key insight is recognizing that g(x)g(x) follows the form a⋅bxa \cdot b^x, where 7 is the initial value and 54\frac{5}{4} controls how fast it grows—each unit increase in xx multiplies the output by 54\frac{5}{4}. Understanding this structure lets you evaluate gg at any input, find growth rates, or solve equations involving exponential relationships.

Intuitive explanation

This is an exponential function where the base 54\frac{5}{4} is greater than 1, so the function grows as xx increases. The key insight is recognizing that g(x)g(x) follows the form a⋅bxa \cdot b^x, where 7 is the initial value and 54\frac{5}{4} controls how fast it grows—each unit increase in xx multiplies the output by 54\frac{5}{4}. Understanding this structure lets you evaluate gg at any input, find growth rates, or solve equations involving exponential relationships.

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