Which of the following functions has a graph that is a
line
f(x) = Ixl
f(x) = x
f(x)=x²

With the help of equations we can say that function has a f(x) = x,straight line.What is an equation?A mathematical equation is a formula that uses the equals symbol (=) to connect two expressions and express their equality.A well-formed formula consisting of two expressions linked by an equals sign is considered to be an equation in English, but the word's cognates in other languages may have slightly different definitions.For instance, an équation is defined as having one or more variables in French.Finding the variables' values that cause the equality to be true is the first step in solving an equation with variables.The variables for which the equation must be solved are also known as the unknowns, and the unknowns' values that fulfill the equality are known as the equation's solutions. Equations can be categorized as either identities or conditional equations.acc to our question-f(x) = Ixlf(x) = xf(x)=x²Hence, function f(x) = x is a line.learn more about equations click here:brainly.com/question/2972832#SPJ13