What does "linear function" mean?

Any function whose graph is a straight line: f(x)=ax+b

Linear function

Common synonyms include: affine function, constant rate function, constant slope function, line function, linear mapping, math transformation.

noun

noun ·Rare ·Advanced level

Noun

1
Any function whose graph is a straight line: f(x)=ax+b
2
a mathematical function whose graph (in Cartesian coordinates with uniform scales) is a line in the plane. wordnet
3
Any function whose value on the sum of two elements is the sum of the values of the function on the two elements and whose value on the product of a scalar times an element is the scalar times the value of the function on the element: f(ax+by)=af(x)+bf(y)