Answer:
50% of all students scored more than 48 marks.
Step-by-step explanation:
1) The baseline of the box, in a box plot is the first quartile, the line in the middle is the median or Q2 and the last line (or top line) is the third quartile. Namely,
![Q_{1}=30, Q_{2}=48 \:and\:Q_{3}=70](https://tex.z-dn.net/?f=Q_%7B1%7D%3D30%2C%20Q_%7B2%7D%3D48%20%5C%3Aand%5C%3AQ_%7B3%7D%3D70)
2) The Question says "nobody took 30, 48 or 70 as their grades. But 120 students gained less than 70", i.e. 120 are within the 75% of the sample.
3) If
then 50% of the students scored more than 48. And 50% of the students scored less than 48. That is also known as the Median.
So 50%, the half of all students scored more than 48 marks.
Answer:
1st, 4th and 5th are correct. The rest is not correct.
Answer:
4/5x - y = -2 is the answer.
Product means to multiply so the product of 7 negative numbers and 8 positive numbers is going to be negative!
Answer: y=4x-3
Step-by-step explanation:
point slope form is y-y1=m(x-x1)
y-1=(4)(x-1)
y-1=4x-4
y=4x-3