The frequency polygon below shows the distribution of scores of the approximately 1,080,000 students who took an SAT exam.

How many students scored between 1200 and 1400 on the exam?
? students

Question

The frequency polygon below shows the distribution of scores of the approximately 1,080,000 students who took an SAT exam.

How many students scored between 1200 and 1400 on the exam?
 ? students

anonymous · Answer

attachment

kropot72 · Answer

The frequency polygon was formed by marking the midpoints of the tops of histogram bars and joining them with straight lines. The histogram bars are no longer shown, however the dots on the polygon show where the midpoints of each bar would be. If you find the dot on the polygon between SAT scores of 1200 and 1400, you can read off the vertical axis the number of students ( in thousands) in the stated class interval (between 1200 and 1400).

anonymous · Answer

i got 340

kropot72 · Answer

|dw:1416936377379:dw|
The the dot on the polygon between SAT scores of 1200 and 1400 is marked in the drawing above. Now you can read off the vertical axis the number of students ( in thousands) in the stated class interval (between 1200 and 1400).
Hint: Don't forget that the figures on the vertical axis are the number of thousands. Therefore you need to add '000'.