In air, the speed of sound S, in meters per second, is a linear function of the air temperature T, in
degrees Celsius, and is given by S(T) = 0.6T + 331.4.
Which of the following statements is the best
interpretation of the number 331.4 in this context?
A) The speed of sound, in meters per second, at
0°C
B) The speed of sound, in meters per second,
at 0.6°C
C) The increase in the speed of sound, in meters per
second, that corresponds to an increase of 1°C
D) The increase in the speed of sound, in meters per
second, that corresponds to an increase of 0.6°C

answer: the answer is   graph (a)

0 and 5 minutes

step-by-step explanation:

given that one morning eight buses arrive late by the number of minutes given below:

0 8 2 6 9 2 0 7 8

write these in ascending order

0   0 2 6 7 8 8 9

in the afternoon two more buses arrive at the bus stop say by x and y minutes late.

total number of buses = 10

median = average of 4th and 5th after arranging in ascending order

since 4th entry is 6, the values of x and y should be below 6

also given 0 is the mode so either x or y or both should be 0 because then only 0 gets the maximum frequency and hence mode

thus we have

0 0 0 2 6 7 8 8 9 and another unknown entry which is below 6.

since median is 3.5, we have the unknown entry to be 5 only because then only median =( 2+5)/2

thus the after noon buses were late by 0 and 5 minutes.

parallel lines have the same slope. so if the green line has a slope of -4, the slope of the red line is also -4.