SOLUTION: After visiting relatives who live 200 miles away, your family drives home at an average speed of 50 miles per hour. Your distance d (in miles) from home is given by d = 200 - 50t

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Question 166915This question is from textbook Algebra 1
: After visiting relatives who live 200 miles away, your family drives home at an average speed of 50 miles per hour. Your distance d (in miles) from home is given by d = 200 - 50t where t is the time (in hours) spent driving. Graph the function and identify its domain and range. What is your distance from home after driving for 1.5 hours? This question is from textbook Algebra 1

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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After visiting relatives who live 200 miles away, your family drives home at an average speed of 50 miles per hour. Your distance d (in miles) from home is given by d = 200 - 50t where t is the time (in hours) spent driving. Graph the function and identify its domain and range. What is your distance from home after driving for 1.5 hours?
:
A graph of this:
+graph%28+300%2C+200%2C+-4%2C+5%2C+-100%2C+225%2C+200-50x%29+
:
You can see from the graph:
Domain; 0 to +4
Range: 0 to +200
:
What is your distance from home after driving for 1.5 hours?
:
You can estimate this from the graph, however find the exact solution:
Substitute 1.5 for t in the equation:
d = 200 - 50(1.5)
d = 200 - 75
d = 125 mi in 1.5 hrs
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