The table shows the height of a plant as it grows.
a. model the data with an equation.
b. based on your model, predict the height of the plant at 12
months.
"y-3=
(x - 15); 57 cm
time plant height
(months) (cm)
15
5
7
b y - 15 - 5(x – 3); 60 cm
cy
(x-3): 30 cm
d the relationship cannot be modeled.

Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?