Given details show the how many hours of sleep the students take and and how much marks the students score in an examination.
Number of hours slept is taken in x-axis (abscissa).
Test score is taken in y-axis (ordinate).
Therefore, (x, y) = (hours slept, test score)
So, the ordered pairs set up to plot the scatter plot in the order (hours slept, test score).
Answer:
x < 4
Step-by-step explanation:
We have that: 1 + 2x < 9. Let's solve this as if the < sign was an = sign:
1 + 2x < 9
Isolate the variable:
2x < 9 - 1
2x < 8
Divide by 2:
x < 8/2
The answer is x < 4.
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0
The slope of a horizontal line is zero (0). For any finite "run", the "rise" is zero.
slope = rise/run = 0/run = 0
into 
the answer will be 