Analyzing Rate of Change: Uniform Pattern in X-Y Coordinate Table

Rate of Change with Coordinate Tables

Given a table showing points on the graph of a function, determine whether or not the rate of change is uniform.

XY-2024681012

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Determine if the rate of change is uniform?
00:06 It appears that the change in X values is always equal
00:13 It appears that the change in Y values is always equal
00:17 Therefore the rate of change is uniform
00:20 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Given a table showing points on the graph of a function, determine whether or not the rate of change is uniform.

XY-2024681012

2

Step-by-step solution

To determine if the rate of change is uniform, we will follow these steps:

  • Step 1: Calculate the rate of change between each pair of consecutive points.
  • Step 2: Compare these rates to determine if they are consistent.

Let's work through the calculations:

Step 1: Calculate the rates of change (slopes) between consecutive points.

From (2,6)(-2, 6) to (0,8) (0, 8): 860(2)=22=1. \frac{8 - 6}{0 - (-2)} = \frac{2}{2} = 1.

From (0,8)(0, 8) to (2,10) (2, 10): 10820=22=1. \frac{10 - 8}{2 - 0} = \frac{2}{2} = 1.

From (2,10)(2, 10) to (4,12) (4, 12): 121042=22=1. \frac{12 - 10}{4 - 2} = \frac{2}{2} = 1.

Step 2: Compare the rates.

All calculated rates are equal to 1, indicating that the rate of change is uniform.

Therefore, the solution to the problem is the rate of change is Uniform.

3

Final Answer

Uniform

Key Points to Remember

Essential concepts to master this topic
  • Rule: Calculate rate using formula: change in y divided by change in x
  • Technique: For consecutive points: 860(2)=22=1 \frac{8-6}{0-(-2)} = \frac{2}{2} = 1
  • Check: All rates must be identical for uniform rate of change ✓

Common Mistakes

Avoid these frequent errors
  • Not calculating all consecutive rates
    Don't just calculate one rate and assume it's uniform = wrong conclusion! You might miss non-uniform patterns. Always calculate the rate of change between every pair of consecutive points to verify consistency.

Practice Quiz

Test your knowledge with interactive questions

Look at the graph below and determine whether the function's rate of change is constant or not:

–5–5–5–4–4–4–3–3–3–2–2–2–1–1–1111222333444555666777888999101010111111–3–3–3–2–2–2–1–1–1111222333444555000

FAQ

Everything you need to know about this question

What exactly does 'uniform rate of change' mean?

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A uniform rate of change means the function increases (or decreases) by the same amount for every equal step in x. It creates a straight line when graphed!

Do I have to check every single pair of points?

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Yes! You must calculate the rate between each consecutive pair. Even if the first few rates are equal, later ones might be different, making it non-uniform.

What if I get different rates for different pairs?

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Then the rate of change is non-uniform! This means the function doesn't form a straight line - it could be curved or have varying steepness.

Can the rate be negative and still be uniform?

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Absolutely! If all your calculated rates are the same negative number (like -2, -2, -2), then it's still uniform - just decreasing instead of increasing.

What's the difference between rate of change and slope?

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They're the same thing! Rate of change is just another name for slope. Both use the formula change in ychange in x \frac{\text{change in y}}{\text{change in x}} .

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