Let x represent temperature in degrees Fahrenheit and y be the number of cricket chirps per minute. For temperatures between 40°F and 100°F, the relationship between temperature and number of cricket chirps is linear. At 40°F, a cricket chirps 0 times per minute. At 80°F, a cricket chirps 180 times per minute.  Write an equation for the number of cricket chirps per minute as a function of temperature in degrees Fahrenheit (from 40 to 100).           How many times per minute does a cricket chirp if the temperature is 66°F?             What is the temperature if a cricket chirps 225 times per minute?

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A:

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.