linear function
definition and properties - see
Functions - Theory - Elementary functions - Polynomials
derivative - see
Derivatives - Theory - Introduction - Elementary derivatives
slope of a linear function - see
Functions - Theory - Elementary functions - Polynomials
ratio of, useful trick - see
this problem
in Functions - Solved Problems - Basic properties
ratio of, integral - see
Integrals - Methods Survey - Methods of integration - Ratio of linears