It would have to be number 2 if it's a dotted line, all the other options are incorrect unless you made a mistake with one or two of the symbols.
Explanation
Part A
We can use the formula below to find the mean.

We will then have;

Mean = 6.2632
Part B
Since the data set is odd.

Answer: From the column of cumulative frequency cf, the median is 7
Answer:
graph 1
Step-by-step explanation:
if it's all the times BETTER
then it shouldn't include 15
Answer:

Step-by-step explanation:
Given:
Make the power of '10' equal by shifting the decimal place of any one value.

Taking the '
' common

Adding the values in the bracket gives:
