Vocabulary – add these to your pink sheet New word: Visual Clue: Definition: Parallel lines that don’t cross lines with the same slope m = ½ II m = ½ Perpendicular lines that cross at 90 o angles lines with the opposite reciprocal slopes m = ½ m = -2 T 90 o

Notice: The notes and assignment for this lesson are available as a handout. The notes and assignment for this lesson are available as a handout. The folder for this hand out is available in the box for unit five on the home page The folder for this hand out is available in the box for unit five on the home page

2 sets of data plotted as ordered pairs on a graph. Used to study relationships between data

As time spent studying increases (goes up), scores increase (go up) What if someone spent 10 minutes studying got a 97%? Outlier

r ≈ 0.5 r ≈ 0.9r = 1

r ≈ -0.4r ≈ r = -1 r = 0

Positive, as time goes on, price increases.

Use the points (1993, 9.60) and (1998, 13.60) to find the equation of the line of fit. Use your equation to predict the average cost of baseball tickets in the year m= 13.6 – – 1993 m= 4 5 m= 0.8 y – y 1 = m(x – x 1 ) y – 9.6 = 0.8(x – 1993) y – 9.6 = 0.8x y = 0.8x y = 0.8(2007) y = The line that best fits the data!

Lesson 5-7 Complete the handout from class Assignment: Chapter 5 Test (part 2) on Monday!