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**Unformatted text preview: **January 28, 2011 • Now to Section 1.2 • Describing Relationships between Two Variables Ways to Visualize Two-Variable Data • Table • Scatter Plots • Equations (is actually one of our goals for ways to describe data) • 60-second summary Table,Scatter Plot, and Equation Income Tithe 10 1 100 10 40 4 20 2 50 5 O bj1 0 2 T=.10*I Income 10 100 40 20 50 Tithe 1 10 4 2 5 • Horizontal Axis on a graph – May be x – May be time t (graph then called a time series) – Could be another variable – Depends on the problem • Vertical Axis on a graph – May be y – Could be another variable – Depends on the problem • Increasing – If vertical axis value gets larger as horizontal axis value gets larger • Decreasing – If vertical axis value gets smaller as horizontal axis value gets larger • Tithe graph was increasing • For our purposes both instances called growth (either positive or negative) • We’ll get into the mathematical terminology in a few days • Bible has many verses that talk about growth (there the meaning is POSITIVE growth) •...

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