Beth records the height of a plant for 8 weeks and creates a scatter plot of the data. What is the equation of the line of best fit? What will the plant’s height be in 20 weeks?

Question

hahaha145 · Answer

A. 
The equation is y = 2x + 5, and the height is 40 inches.
B. 
The equation is y = -2x + 5, and the height is 35 inches.
C. 
The equation is y = 2x, and the height is 40 inches.
D. 
The equation is y = 2x, and the height is 35 inche

Vocaloid · Answer

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Vocaloid · Answer

the equation of best fit is in blue
write an equation for the blue line in y = mx + b form where b is the y-intercept (where the line crosses the y-axis) and m is the slope (rise/run)

then, since it asks for the height at 20 weeks, look where the line is at x = 20 and find the appropriate height value