2.1 Scatter plots Use a calculator
Line of best fit
1
1 point
To the nearest tenth, a=
The table below gives the number of hours spent studying for a science
exam (x) and the final exam grade (y)
X
2 5 1 O 4 2 3
у 77 92 70 63 190 75 84
Type your answer...
2
1 point
To the nearest tenth, b=
7
Type your answer..
3
3
1 point
Create the question of the line. Note: do NOT use spaces
9
y= type your answer...

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?