A horizontal line is one for which the value of y is the same for the entire length of the line. Therefore this type of line can be expressed as below:

Where "c" is a constant that changes the position of the line on the coordinate plane. If c is equal to 2, then we have a constant line that crosses the y-axis at the position 2 for example.
Answer/step-by-step explanation:
The graph of f(x) above is said to be the quantity of liquid a cylinder holds when poured into it at a given time, x.
This means the quantity of the liquid poured in the cylinder is a function of time.
f(x) values (quantity of liquid) are plotted on the y-axis, while x values (time) are plotted on the x-axis.
f(3) is the value at the y-axis when x = 3. Thus, when x = 3, y = 6.
Therefore, the value of f(3) = 6
f(3) = 6, represents the quantity of liquid poured in the cylinder at 3 seconds.
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Step-by-step explanation:
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