Julissa is running a 10-kilometer race at a constant pace. After running for 18 minutes, she completes 2 kilometers. After running for 54 minutes, she completes 6 kilometers. Her trainer writes an equation letting t, the time in minutes, represent the independent variable and k, the number of kilometers, represent the dependent variable.
Which equation can be used to represent k, the number of kilometers Julissa runs in t minutes?
k – 2 = (t – 18)
k – 18 = (t – 2)
k – 2 = 9(t – 18)
k – 18 = 9(t – 2)
Answers
Answered by
10
Answer:
4th Option is correct.
Step-by-step explanation:
Given:
Race is of 10 km
Time taken by Julissa to cover 2 km = 18 minutes
Time taken by Julissa to cover 6 km = 54 minutes
t is the time taken in minutes and it is an independent variable.
k is the number of km Julissa covered and it is a dependent variable.
To find: Equation that can represent the given situation.
From first relation,
Time taken by Julissa to cover 1 km = 18/2 = 9 minutes
From second relation,
Time taken by Julissa to cover 1 km = 54/6 = 9 minutes
So, According to the Question
k = 9t
subtract 18 from both sides
k - 18 = 9t - 18
k - 18 = 9 ( t - 2 )
Therefore, 4th Option is correct.
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0
Step-by-step explanation:
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