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Hotmath Practice Problems

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Title:
Hotmath Algebra 1
Author:
Hotmath Team
 
Free, Lessons
Chapter:StatisticsSection:Fitting Equations to Data
 
Problem: 1

Draw a graph using the ordered pairs (d, y). Find an equation for the line of best fit.

Problem: 3

Draw a graph using the ordered pairs (d, c). Find an equation for the line of best fit.

Problem: 5

A 100–year–old redwood tree is 190 feet tall. When it was 50 years old, it was 125 feet tall. Use these two data points to create a linear model, and use that model to estimate the height of the tree when it was 80 years old.

Problem: 7

A telephone company charges 78 for a 14 minute call, and 90 for a 20–minute call. Use this data to create a linear model, and use this model to estimate the cost of a 25–minute call.

Problem: 9

The temperature at an altitude of 200 m above a certain spot is 20C. The temperature 2900 m above the same spot is –7C. Use these two data points to create a linear model, and use the model to estimate the temperature at an altitude of 1500 m.