A national standardized test is graded on a scale from 1 to 5. The scores for a particular school are given below. Ifa student is chosen at random, what is the probability that they scored a 4 or a 5?
No. of Students Score
5
4
45
75
50
20
10
3
2
1
O A 22.5%
B. 45%
O c. 60%
OD. 75%
OE 90%

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.

dalila is incorrect. the whisker on the left is very long, going all the way out to 5. the whisker goes from 5 to 30, so it has a spread of 25. the rest of the box plot values are closer together, so 5 is an outlier

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100