19. measure angle 1 is 135°
20. measure angle 4 is 90°
21. measure angle 5 is 90°
22. measure angle 8 is 45°
Given:
Two points that are close to the line of best fit are (2,70) and (4.5, 90).
To find:
Th equation of best fit line using the given two points.
Solution:
We know that, if a line passes through the two points, then the equation of line is
Two points (2,70) and (4.5, 90) are close to the best fit line.
Consider the two points (2,70) and (4.5, 90). So, the equation of line is
Adding 70 on both sides, we get
Therefore, the equation of best fit line is .
39. A(16) = -6 + 3(16-1) = -6 + 45 = 39.
Loretta:
Average driving speed = 55 mph
Time = 4 hours
Distance traveled = 55*4 = 220 miles
Dad:
Average driving speed = 65 mph
Let x = hours driven
Distance traveled = 65x miles
The length of the trip is 610 miles, therefore
65x + 220 = 610
65x = 390
x = 6 hours
Answer: Loretta's dad drove for 6 hours.
Answer:
1. -5
2. -6
3. -10
Step-by-step explanation: