Temperature on the Fahrenheit scale is a linear function of temperature on the Celsius scale.Ten degrees Celsius equals 50 degrees Fahrenheit,and 25 degrees Celsius equals 77 degrees Fahrenheit.
Natalie spends 90 minutes doing her math and English homework. The time she spends on her math homework is a function of the time she spends on her English homework.
Model each situation with a linear function and graph. Is it reasonable to include negative numbers in the range?