To find the expected height for a 7-year-old student, plug in x=7 into the equation y=4.5x+26.5:
y = 4.5(7) + 26.5
y = 31.5 + 26.5
y = 58
Therefore, the expected height for a 7-year-old student is 58 inches.
The trend line for the graph above is y=4.5x+26.5 Using the equation, what is the expected height (in inches) if a student is 7 years old? __ inches
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