# Alg1.5 Introduction to Exponential Functions

### Lesson 1

• I can compare growth patterns using calculations and graphs.

### Lesson 2

• I can use words and expressions to describe patterns in tables of values.
• When I have descriptions of linear and exponential relationships, I can write expressions and create tables of values to represent them.

### Lesson 3

• I can explain the connections between an equation and a graph that represents exponential growth.
• I can write and interpret an equation that represents exponential growth.

### Lesson 4

• I can use only multiplication to represent "decreasing a quantity by a fraction of itself."
• I can write an expression or equation to represent a quantity that decays exponentially.
• I know the meanings of “exponential growth” and “exponential decay.”

### Lesson 5

• I can explain the meanings of $a$ and $b$ in an equation that represents exponential decay and is written as $y=a \boldcdot b^x$.
• I can find a growth factor from a graph and write an equation to represent exponential decay.
• I can graph equations that represent quantities that change by a growth factor between 0 and 1.

### Lesson 6

• I can use graphs to compare and contrast situations that involve exponential decay.
• I can use information from a graph to write an equation that represents exponential decay.

### Lesson 7

• I can describe the meaning of a negative exponent in equations that represent exponential decay.
• I can write and graph an equation that represents exponential decay to solve problems.

### Lesson 8

• I can use function notation to write equations that represent exponential relationships.
• When I see relationships in descriptions, tables, equations, or graphs, I can determine whether the relationships are functions.

### Lesson 9

• I can analyze a situation and determine whether it makes sense to connect the points on the graph that represents the situation.
• When I see a graph of an exponential function, I can make sense of and describe the relationship using function notation.

### Lesson 10

• I can calculate the average rate of change of a function over a specified period of time.
• I know how the average rate of change of an exponential function differs from that of a linear function.

### Lesson 11

• I can use exponential functions to model situations that involve exponential growth or decay.
• When given data, I can determine an appropriate model for the situation described by the data.

### Lesson 12

• I can describe the effect of changing $a$ and $b$ on a graph that represents $f(x)=a \boldcdot b^x$.
• I can use equations and graphs to compare exponential functions.

### Lesson 13

• I can explain the meaning of the intersection of the graphs of two functions in terms of the situations they represent.
• When I know two points on a graph of an exponential function, I can write an equation for the function.

### Lesson 14

• I can find the result of applying a percent increase or decrease on a quantity.
• I can write different expressions to represent a starting amount and a percent increase or decrease.

### Lesson 15

• I can use graphs to illustrate and compare different percent increases.
• I can write a numerical expression or an algebraic expression to represent the result of applying a percent increase repeatedly.

### Lesson 16

• I can explain why applying a percent increase, $p$, $n$ times is like or unlike applying the percent increase $np$.

### Lesson 17

• I can calculate interest when I know the starting balance, interest rate, and compounding intervals.
• When given interest rates and compounding intervals, I can choose the better investment option.

### Lesson 18

• I can solve problems using exponential expressions written in different ways.
• I can write equivalent expressions to represent situations that involve repeated percent increase or decrease.

### Lesson 19

• I can use tables, calculations, and graphs to compare growth rates of linear and exponential functions and predict how the quantities change eventually.

### Lesson 20

• I can calculate rates of change of functions given graphs, equations, or tables.
• I can use rates of change to describe how a linear function and an exponential function change over equal intervals.

### Lesson 21

• I can determine how well a chosen model fits the given information.
• I can determine whether to use a linear function or an exponential function to model real-world data.