At midnight, the depth of snow on a road is 5 cm. The snow falls at a steady rate and the depth increases by 1.5 cm per hour until 6 am, when it stops. At 9 am the snow starts to melt, so the depth decreases at a constant rate and by 7 pm, the road is clear. A graph of the depth of snow (in cm) against time since midnight is shown below. The horizontal scale is marked in hours using the 12 hour clock. Depth (cm) 4 14 12- 10- 8 6- 4 2 2pm Time (hours) брт 2am 6am 10am Choose the TWO correct options about this graph from the following list. Select one or more: O The gradient of the line between midnight and 6 am represents the time when the snow started to fall. The intercept on the horizontal axis represents the depth of snow at midnight. Between the times of 9 am and 7 pm, the gradient of the line is positive. The maximum depth of snow was 15 cm. The line is horizontal between the times of 6 am and 9 am. Between 9 am and 7 pm, the gradient of the line is about -1.4 cm/h. From midnight to 6 am, the gradient of the line is 5 cm/h. O O C

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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At midnight, the depth of snow on a road is 5 cm. The snow falls at a steady rate and the depth
increases by 1.5 cm per hour until 6 am, when it stops. At 9 am the snow starts to melt, so the
depth decreases at a constant rate and by 7 pm, the road is clear.
A graph of the depth of snow (in cm) against time since midnight is shown below. The horizontal
scale is marked in hours using the 12 hour clock.
Depth (cm) 4
14
12-
10-
8
6-
4
2
2pm
Time (hours)
брт
2am
6am
10am
Choose the TWO correct options about this graph from the following list.
Select one or more:
O The gradient of the line between midnight and 6 am represents the time when the snow
started to fall.
The intercept on the horizontal axis represents the depth of snow at midnight.
Between the times of 9 am and 7 pm, the gradient of the line is positive.
The maximum depth of snow was 15 cm.
The line is horizontal between the times of 6 am and 9 am.
Between 9 am and 7 pm, the gradient of the line is about -1.4 cm/h.
From midnight to 6 am, the gradient of the line is 5 cm/h.
O O C
Transcribed Image Text:At midnight, the depth of snow on a road is 5 cm. The snow falls at a steady rate and the depth increases by 1.5 cm per hour until 6 am, when it stops. At 9 am the snow starts to melt, so the depth decreases at a constant rate and by 7 pm, the road is clear. A graph of the depth of snow (in cm) against time since midnight is shown below. The horizontal scale is marked in hours using the 12 hour clock. Depth (cm) 4 14 12- 10- 8 6- 4 2 2pm Time (hours) брт 2am 6am 10am Choose the TWO correct options about this graph from the following list. Select one or more: O The gradient of the line between midnight and 6 am represents the time when the snow started to fall. The intercept on the horizontal axis represents the depth of snow at midnight. Between the times of 9 am and 7 pm, the gradient of the line is positive. The maximum depth of snow was 15 cm. The line is horizontal between the times of 6 am and 9 am. Between 9 am and 7 pm, the gradient of the line is about -1.4 cm/h. From midnight to 6 am, the gradient of the line is 5 cm/h. O O C
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