Can someone explain linear functions?

Ill give brainliest

Any function whose graph is a straight line

and another meaning:

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.

Answer: the dictionary definition is

Linear functions are those whose graph is a straight line. A linear function has the following form. y = f (x) = a + bx. A linear function has one independent variable and one dependent variable. The independent variable is x and the dependent variable is y.

Step-by-step explanation: it's pretty much just a big long equation for a straoight line