Answer:
c
Step-by-step explanation:
i taken this earlier today
Answer: 1) The best estimate for the average cost of tuition at a 4-year institution starting in 2020 =$ 31524.31
2) The slope of regression line b=937.97 represents the rate of change of average annual cost of tuition at 4-year institutions (y) from 2003 to 2010(x). Here,average annual cost of tuition at 4-year institutions is dependent on school years .
Step-by-step explanation:
1) For the given situation we need to find linear regression equation Y=a+bX for the given situation.
Let x be the number of years starting with 2003 to 2010.
i.e. n=8
and y be the average annual cost of tuition at 4-year institutions from 2003 to 2010.
With reference to table we get

By using above values find a and b for Y=a+bX, where b is the slope of regression line.

and

∴ To find average cost of tuition at a 4-year institution starting in 2020.(as n becomes 18 for year 2020 if starts from 2003 ⇒X=18)
So, Y= 14640.85 + 937.97×18 = 31524.31
∴The best estimate for the average cost of tuition at a 4-year institution starting in 2020 = $31524.31
Answer:
draw two blocks on top of each other being added together
Step-by-step explanation:
draw two blocks being added together...
Answer: A. Ounces of water consumed compared with the number of same-size bottles drunk
Step-by-step explanation:
When a quantity changes uniformly with respect to the change of other quantity, then we say there is a constant rate of change.
Thus, if one quantity is directly proportional to the other quantity then there is constant rate of change.
A. Ounces of water consumed is directly proportional to the number of same-size bottles drunk. Hence there is a constant rate of change of ounces water with respect to the number of same-sized bottles.
Rest of other options do not have directly proportionality relation between the quantities.