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Daniel Math Academy · Grade 8 Math

Predict with Lines of Best Fit

Skill O.2 · Scatter plots & two-way tables · ★★☆ Medium · Quarter 3

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Use the line of best fit to answer each question.

1. 1
   The line of best fit for weeks ($x$) and plant height (cm) ($y$) is $y=4.8x+29$. Predict $y$ when $x=20$.
2. 2
   The line of best fit for minutes of practice ($x$) and words typed per minute ($y$) is $y=3.9x+13$. Predict $y$ when $x=13$.
3. 3
   The line of best fit for weeks ($x$) and plant height (cm) ($y$) is $y=1.1x+16$. Predict $y$ when $x=16$.

Daniel Math Academy · Grade 8 Math

Answer Key

O.2 Predict with Lines of Best Fit · ★★☆ Medium

1. 1$125$
2. 2$63.7$
3. 3$33.6$