The last one. A linear function is a function whose graph is a straight line with one independent variable and one dependent variable.
Step-by-step explanation:
A linear function has the form of y=f(x)=bx+a where where b is the slope of the graph and a is the y-intercept value of the graph.The independent variable is x where as the dependent variable is y.
For example the function f(x)=2x-3 is a linear function where the slope is 2 and the y-intercept is -3.
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Linear functions : https://brainly.com/question/9994201
Keywords : Linear function, graph
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