- #1

IrinaK.

- 33

- 0

## Homework Statement

Hello!

Here is the problem from Stitz-Zeager Pre-calculus book:

At 9 PM, the temperature was 60F; at midnight, the temperature was 50F; and at 6 AM,

the temperature was 70F . Use the technique in Example 8.2.3 to t a quadratic function

to these data with the temperature,

**T**, measured in degrees Fahrenheit, as the dependent

variable, and the number of hours after 9 PM,

**t**, measured in hours, as the independent

variable. What was the coldest temperature of the night? When did it occur?

**2. Homework Equations**

## The Attempt at a Solution

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My question is about the number of hours as undependable variable:

do you think authors mean x1=9, x2=3, x3=9 by saying "the number of hours

**after**9PM"? Or do you think it should be x1=9, x2=0, x3=6, or x1=9, x2=12, x3=6?

I am confused :)

Thank you!