Determine if each answer choice represents a proportional or non-proportional linear relationship. Drag each answer choice to the correct column. The order does not matter.
Answer Choices:
A cellphone company charges $19.95 per month for the first 2G of data usage, then $5 per gig of usage over the initial 2G
y-intercept is not the origin
A cellphone company charges $29.95 per month for unlimited data usage.
Direct Variation
y = 5x + 1
y = -7x
y = x
4y = 2x
Proportional Linear Relationship:
- Direct Variation
- y = -7x
- y = x
- 4y = 2x (when simplified, y = 0.5x, which is proportional)
Non-proportional Linear Relationship:
- A cellphone company charges $19.95 per month for the first 2G of data usage, then $5 per gig of usage over the initial 2G
- y-intercept is not the origin
- A cellphone company charges $29.95 per month for unlimited data usage.
- y = 5x + 1 (has a non-zero y-intercept, which indicates a non-proportional relationship)