Use the graph to write an equation of the line Savings Account
YA
350
(4, 300)
250
Interpret the slope.
Balance (dollars)
100
150
The balance increases $50 each week.
The balance increases $100 each week
The balance decreases $50 each week.
The balance decreases $100 each week
2 4 X
Time (weeks)

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.