Marsha recorded the time it took seven children of different ages to run one lap around the track. Using the line of best fit, which is closest to the length of time it should take Marsha’s 6 year old niece to run one lap?

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step-by-step explanation:

since the figure has a shape of a trap-ezium, we use the formula, for calculating the area of a trap-ezium to find its area. this formula is given by;

where and are length of the opposite parallel sides and h is the vertical height.

this gives us

square feet

4: 9 is the basic ratio for 36: 81