SOLUTION: How to graph this linear function to find the domain and range? f(x)=3x

Question 525657: How to graph this linear function to find the domain and range?
f(x)=3x
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Step 1. Pick a value for

. It can be anything you like, but 0, 1, or some other small integer usually works well and makes the arithmetic easier.

Step 2. Substitute that value in place of

in your equation. Do the arithmetic and determine the value of

that results.

Step 3. Take the value of

that you selected for step 1 and the value of

that you calculated in step 2 and form an ordered pair

Step 4. Plot the ordered pair from Step 3 on your graph. Remember that the

value is the distance right or left along the horizontal axis and the

value is the distance up or down along the vertical axis.

Step 5. Repeat steps 1 through 4 with a different value for

.

Step 6. Draw a line across your graph that passes through the two points that you plotted.

The domain of any linear function is the set of all real numbers, the range of any linear function with a slope not equal to zero is all real numbers. The range of a linear function with a zero slope is the constant value of the function.

John

My calculator said it, I believe it, that settles it

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