## Reflection: Intervention and Extension Find intercept by solving equations - Section 3: Practice

At this point in the unit, my students have several different topics which require reteaching or review:

• Some students need a refresher about the domain and range. When I work with these students I begin by asking the student what they know about each concept. Other questions will include when do you know the domain (range) is all real numbers? When is the domain(range) not all real numbers?"
• Another group of students is struggling with asymptotes. I again ask students what they know about asymptotes. We talk about how the graph gets really close to the asymptote. We discuss the shape of exponential and logarithmic graphs.
• A third group is struggling with how to find the intercepts. I want to know if the students are confused about solving equations, or, what the process is for solving equations to identify the intercepts. The students understand that they need to let either x or y be zero to find the intercepts. The main issue is finding the x-intercept. I have the students solve the equation as I watch and correct any errors. These students usually know what they are doing but are not confident since the numbers are not "nice" numbers.

Reteaching strategies
Intervention and Extension: Reteaching strategies

# Find intercept by solving equations

Unit 3: Exponential and Logarithmic functions
Lesson 6 of 11

## Big Idea: It is sometimes necessary to solve an equation to find the x and y intercepts of a logarithmic or exponential graph.

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Standards:
Subject(s):
Math, graphing exponential functions, Graphing logarithmic functions, PreCalculus, exponential function, logarithmic functions, equation solving, Properties of Logarithm
70 minutes

### Katharine Sparks

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