Lesson 5.7 Predict with Linear Models The Zeros of a Function Essential Question: How can you use a best-fitting line to make predictions about data? What are the zeros of a function?

Before we start…

What is a best-fitting line? The line that most closely follows a trend in the data. The process of finding the best-fitting line to model a set of data is called linear regression.

Why would you use linear regression? By using linear regression, you find the best-fitting line of a set of data which allows you to make predictions. You use a line of best fit to make a prediction about a value that is not in your data set.

How do you perform linear regression? You will use technology to complete linear regression. There are two methods: Linear interpolation You approximate a value between two known values. Linear extrapolation You approximate a value outside the range of known values.

What is a zero of a function? A zero of a function is an x-value for which

How do you find a zero of a function? Set the function equal to 0. Solve the equation for x.

How can you use a best-fitting line to make predictions about data? What are the zeros of a function?

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