To find Y intercept
You do y2-y1/ x2-x1
Your y2 is 12, y1 is 2
Your x2 is 2 , x1 is 3
So 12-3/2-3
12-3 is 9
2-3=-1
9/-1 is -9
So your slope is -9
Answer:11km/hr
Step by step explanation
In 1hr a cyclist travels 10 km so multiply 10 by 2 then he travels 13 km in 1 hour so keep it the same add 10(2)+13 to get 33 it took him 3 hrs in total to travel this distance so you must then divide 33 by 3 and you get average speed 11 km/hr
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The formula for diameter is:
circumference/pi (3.14)
If the circumference is 443, we can divide that by pi.
The answer would then be choice b (141).