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Tess plants flowers every year, and she noticed that her flowers tend to bloom earlier when the spring weather is warmer. She collected data for the past 6 years on the average March temperature where she lives, and the date in April her first flowers bloomed that year. A line was fit to the data to model the relationship.

Answer :

The estimated date in April that her flowers will bloom if the average temperature in March is 5.5 °C is; 17th April

How to Interpret Line of best fit?

We want to estimate the date in April that her flowers will bloom if the average temperature in March is 5.5 °C.

From the attached graph, we need the slope and the y-intercept to find the equation of the linear model.

This line goes through (0,28) and (1,26). Thus, the slope is;

Slope = (26 - 28)/1

Slope = -2

Thus, the equation that best describes the model is;

y = -2x + 28

At x = 5.5 °C.

y = -2(5.5) + 28

y = 17

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