A16­7ScatterPlotsAndEquationsOfLines.notebook
Algebra 1
Ch.6 Notes Page 33
P33 6­7 Scatter Plots and Equations of Lines
Sep 2­8:31 AM
February 17, 2015
Finding Equations from two points.
Calculate Slope (m) ­ Calculate Y­Intercept (b)
y = mx + b
(­4, 6) and (­2, 8)
(3, 2) and (5, 8)
Jan 6­8:06 AM
Writing Equations of Trend Lines
Use the two points to write the equation of the line.
Use data points to make a Scatter Plot
Draw in a Trend Line
Finding Equations from one point and slope.
Calculate Slope (m) ­ Use a Point
y ­ y1 = m(x ­ x1)
(3, 2) and (5, 8)
(­4, 6) and (­2, 8)
Two Points on the Trend Line are (14, 30) and (24, 48)
Oct 14­8:55 AM
Predict the wingspan of a hawk that is 28in long.
Jan 5­3:16 PM
1
A16­7ScatterPlotsAndEquationsOfLines.notebook
February 17, 2015
Graph the data below. Draw the trend line.
Write the equation of the Trend Line.
Estimate the number of Calories if a food has 14g of fat.
Calories and Fat
Fat (g)
6
Calories
276 260 220 338 430 550 633 7 10 19 20 27 36 Calculator Setup for r values
(Correlation Coefficients)
100
r values indicate how accurate the regression equation is for the data.
5
Neg. Corr.
Jan 5­3:16 PM
Pos. Corr
Oct 14­1:56 PM
Graphing Calculator
Regressions
Oct 13­3:36 PM
No Corr.
Graphing Calculator
Calories and Fat
Fat (g)
6
Calories
276 260 220 338 430 550 633 7 10 19 20 27 36 Oct 13­3:37 PM
2
A16­7ScatterPlotsAndEquationsOfLines.notebook
Graphing Calculator
Golf Example
February 17, 2015
HW #35
6­7 P352 #2,4,7,9­11,24,25,27,28,30­32
Club­head speed, mph (x)
100 102 103 101 105 100 99
Distance, yards (y)
257 264 274 266 277 263 258 275
105
Please put your name and class period at the top of the homework.
Also include the homework number.
Oct 13­3:29 PM
3