1. The like graph is dated day by day. To make it easier you could maybe do two days at a time. For example, 24- sep- 26- sep. This will decrease less confusion. To graph it correctly just make the line for the higher numbers taller and for the smaller, shorter.
2. I gave you the answer for this one it the last sentence . :)
The correct answer is f(x)=-5+0.5x
Looking at the data, we can see that the data increases at a constant rate. We can find this rate, the slope, using the formula
m=(y₂-y₁)/(x₂-x₁)
Using the first two ordered pairs, we have
m=(1-0.5)/(12-11) = 0.5/1 = 0.5
Writing this in point-slope form, y-y₁=m(x-x₁), we have
y-0.5=0.5(x-11)
Using the distributive property, we have
y-0.5=0.5x-0.5*11
y-0.5=0.5x-5.5
Adding 0.5 to both sides,
y-0.5+0.5=0.5x-5.5+0.5
y=0.5x-5
Answer:
B: Permutation; Number of ways = 60
Step-by-step explanation:
First we have to decide if this is a problem of permutation or combination. The rule is:
- If the order matters, permutations will be used
- If order does not matter, combinations will be used
In this problem, they order of awarding the medals matters, so this is a permutation problem.
We have to award 3 medals among 5 runners. So this can be done in 5P3 ways:
Therefore, there are 60 ways to award the medal. Therefore, the correct answer is B.