Algebra-1

Question Analysis
This question evaluates the student's ability to determine the constant rate of change by analyzing a graph. The slope of the line, which is the constant rate of change, can be calculated using the given points.

Key Concept Explanation
The constant rate of change, or slope, is the ratio of the vertical change to the horizontal change between any two points on a line. This is a geometric interpretation of the rate of change.

Step-by-step Solution
1. Identify the given points: (1, 3) and (3, 9).
2. Use the formula for slope: .
3. Substitute the values:

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