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expeople1 [14]
3 years ago
14

16 POINTSS!! HELPPPP The graph shows the cost per day of electricity over a seven-day period.

Mathematics
1 answer:
Vsevolod [243]3 years ago
8 0
It would be positive correlation, in the picture included you'll see what should positive correlation look like.

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A car completes a journey at an average speed of 40km/h.At what speed must it travel on the return journey if the average speed
nalin [4]
The distance, s = 40t₁ where t₁ is the time to complete the outward journey.
The same distance = vt₂ where t₂ is the time to complete the return journey at speed v.
For the whole journey, 2s=60(t₁+t₂). Therefore s=30(t₁+t₂)=40t₁=vt₂.
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3 years ago
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8 0
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