Math Problem Statement

A researcher studied the relationship between the number of times a certain species of cricket will chirp in one minute and the temperature outside. Her data is expressed in the scatter plot and line of best fit below. Based on the line of best fit, what temperature would it most likely be outside if this same species of cricket were measured to chirp 116 times in one minute?

Solution

To solve this problem, we need to determine the temperature corresponding to 116 chirps per minute based on the line of best fit shown in the scatter plot.

First, let's identify the equation of the line of best fit. We have two points from the line of best fit:

  • Point 1: (100, 63)
  • Point 2: (104, 64)

We can use these points to determine the slope mm of the line: m=y2y1x2x1=6463104100=14=0.25m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{64 - 63}{104 - 100} = \frac{1}{4} = 0.25

Next, we need to find the y-intercept bb of the line using the point-slope form of the equation of a line y=mx+by = mx + b. Using point (100, 63): 63=0.25100+b    63=25+b    b=6325=3863 = 0.25 \cdot 100 + b \implies 63 = 25 + b \implies b = 63 - 25 = 38

Therefore, the equation of the line is: y=0.25x+38y = 0.25x + 38

Now, we can use this equation to find the temperature when the chirps per minute are 116: y=0.25116+38=29+38=67y = 0.25 \cdot 116 + 38 = 29 + 38 = 67

So, the temperature would most likely be 67F67^\circ \text{F} if the crickets chirped 116 times in one minute.

Would you like further details or have any questions?

Here are five additional questions related to this problem:

  1. How would you determine the equation of the line of best fit using more data points?
  2. What is the significance of the slope in the context of this problem?
  3. How can you check the accuracy of your line of best fit?
  4. How would the temperature change if the number of chirps increased to 120 per minute?
  5. What other factors could affect the relationship between cricket chirps and temperature?

Tip: When calculating the equation of the line of best fit, ensure that the points you choose accurately represent the trend shown by the data.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Line equation: y = mx + b

Theorems

Equation of a line

Suitable Grade Level

Grades 8-10