The intersection of two planes is a line. That's not necessarily the definition of a line, but that's probably what they're looking for.
Answer: line
Hello there! The answer is C. 7/9.
The question is asking you how to find the absolute value of -7/9. Absolute value is the value of the number, regardless if it is negative or positive. So, that makes C your answer.
I hope this was helpful in finding an answer to your question, have a great day! :)
Answer:

Step-by-step explanation:
9 pencils cost $7.74
6 pencils cost x
The ratios are

According to the alternendo property,

Answer:
C: A line travelling to the right with an open dot on p = -3.
Step-by-step explanation:
You use a closed dot when the equation is greater/less than or equal to: 
It goes right because if it went left it would be p < -3.