The graph below shows the heights and arm spans of students in a classroom. Height and Arm Span of Students Based on the graph, which is the best prediction of the height of a student with an arm span of 143 cm?

The best prediction of the height of a student with an arm span of 143 cm is 143 cm
Step-by-step explanation:
The missing graph is attached
The graph below shows the heights and arm spans of students in
a classroom
The x-axis represents the height in cm
The y-axis represents the arm span in cm
We need to find the height of a student with an arm span of 143 cm
∵ The graph does not contain the value of the given arm span
∴ We will use the line best fit (sold line in the attached graph) to find
the best predication of the height
∵ The line passes through points (150 , 150) and (160 , 160)
- The x-coordinates are equal the y-coordinate
∴ The equation of the line is y = x
∵ The arm span of a student is 143 cm
∵ y represents the arm span of a student
∴ y = 143
- Substitute the value of y in the equation of the line best fit
∵ y = x
∴ 143 = x
∵ x represents the height of a student
∴ The height of the student is 143 cm
The best prediction of the height of a student with an arm span of 143 cm is 143 cm

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