How do you recognize and evaluate a math function? When we think about math functions and equations, one thing that immediately comes to mind is the unknown variables. In other words, the evaluation, you'll be doing will reflect on substituting a value to the unknown variable within a formula or function. Moreover, the evaluating equations works extremely well with equations, formulas, and functions have equaled sign in them. Usually, an equation equals another variable whose value is also unknown or a function. Let us find out how Evaluate f(x) = y = 5x - 3, x = 1. Now, you have to place the value of x in the function. f(1) = y = 5(1) - 3, f(1) = y = 5 - 3, f(1) = y = 2 Now, the question was not to find the value of y, because y is dependent on x. In other words, you get the value 2 for y, because the value of x for this function is 1.
Functions are like machines, to a small degree, in that you put something into the machine and the same or an easily predictable
product will come out the machine. I like to use the example of a bagel slicer. You know when you put a bagel into the machine, a cut bagel is coming out. Maybe they are not all the same exact bagel, but very predictable. A function in math is just a relationship between a set of inputs and outputs. In this section of worksheets you will first identify functions and then you will complete them. These worksheets explain what a function is and how to solve for one. Your students will also use
these worksheets in order to practice identifying relations and functions.
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