Algebra 1 - Ch. 4.5 Analyzing Lines of Fit Bk. Pg. 216-218

Groups:

(a) Residual of 1 or -1

,

(b) Residual of 2 or -2

,

(c) Residual of 3 or -3

,

(d) Residual of 4 or -4

• (12, 75)

• (13.5, 88)

• (3, 23)

• (1.5, 14)

• (9, 62)

• (4.5, 29)

• (6, 42)

• (7.5, 48)

• (10.5, 63)

Problem #2

Use residuals to determine whether the model is a good fit for the data in the table.

• yes

• no

Problem #2

Use residuals to determine whether the model is a good fit for the data in the table.

Explain why or why not.

• the residual points are not evenly dispersed about the horizontal axis

• the residual points are evenly dispersed about the horizontal axis

Groups:

(a) Residual of 0

,

(b) Residual of 1 or -1

,

(c) Residual of 2 or -2

,

(d) Residual of 3 or -3

• (4, -1)

• (20, -9)

• (12, -10)

• (18, -9)

• (16, -10)

• (8, -6)

• (6, -3)

• (10, -8)

• (14, -10)

Problem #4

Use residuals to determine whether the model is a good fit for the data in the table.

• yes

• no

Problem #4

Use residuals to determine whether the model is a good fit for the data in the table.

Explain why or why not.

• the residual points are not evenly dispersed about the horizontal axis; the residual points form a nonlinear pattern

• the residual points are evenly dispersed about the horizontal axis; the residual points form a linear pattern

Problem #8 equation

Use technology to find an equation of the line of best fit for the data.

Mathematical Equivalence

ON

Problem #8 identify the correlation coefficient

Identify and interpret the correlation coefficient.

Problem #8 interpret the correlation coefficient

Identify and interpret the correlation coefficient. (Select all that apply.)

• weak negative correlation

• strong negative correlation

Problem #10 a

The table shows the total numbers y of people who reported an earthquake x minutes after it ended.

a. Use technology to find an equation of the line of best fit.

The equation of the line of best fit is ​ (a)