Math 8B graphing proportional relationships quick check

Answer 1

1. True or False: The graph of a proportional relationship is always a straight line that passes through the origin.

- True

2. Which of the following equations represents a proportional relationship?

a) y = 3x - 1
b) y = 2x + 4
c) y = 5x
d) y = x^2

- c) y = 5x

3. What does the slope of the graph of a proportional relationship represent?

- The slope represents the constant of proportionality.

4. If a graph of a proportional relationship passes through the point (2, 10), what would the equation of the line be?

- y = 5x

5. How can you determine if a relationship is proportional from a given graph?

- If the points fall on a straight line and pass through the origin, the relationship is proportional.