Explain step by step
Amy's weight this year is 50 pounds less than twice her weight from last year. If she weighs 120 pounds this year,
write an equation for her weight last year and calculate her weight from last year.
Choose three or more different weights for amy, maintaining the same conditions, and graph the relationship
for a variety of cases.
based on your observation, does the graph make sense? Explain your finding
Answers
Given : Amy's weight this year is 50 pounds less than twice her weight from last year. she weighs 120 pounds this year,
To Find : an equation for her weight last year and calculate her weight for last year.
Solution
Assume that last year Amy's weight = W pound
Amy's weight this year is 50 pounds less than twice her weight from last year.
= 2 W - 50
she weighs 120 pounds this year
=> 2W - 50 = 120
=> 2W = 170
=> W = 85
Amy's weight last Year = 85 Pound
W Last Year Weight
50 50
60 55
70 60
80 65
90 70
100 75
110 80
120 85
130 90
140 95
150 100
Graph is linear
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