Their slopes must be the same, but with different y-intercepts.
Here is an example: 2x + 1 and 2x + 4 are parallel lines.
Is there any answer choices? I believe it is 2/5
Answer:
a) 
b) 
c), Yes;
Step-by-step explanation:
Michael's Weight: 
Al's weight: 
a) Ratio of Michael's weight to Al's weight: 
b) This ratio simplifies to: 

c) Yes, If the exponent in each expression were negative, then we have:
Ratio of Michael's weight to Al's weight: 
This ratio simplifies to: 
The two ratios are not the same.