# Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises: 4

$18$

#### Work Step by Step

To find the value of $y$ in the given function when $x=6$, substitute $6$ to $x$ to obtain: $y=4x-6 \\y=4(6)-6 \\y=24-6 \\y=18$ Thus, the given function includes the ordered pair $(6, 18)$. Therefore, the missing expression in the given statement is: $18$.

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