1^st Hour Topics 1 Name: ______________________________________

Applying Rates as Ratios

In Class Assignment/Homework 9-19-06

1) Ryan is building a model car whose scale is that every 2 inches on the model represents 5 feet in real life.

a) What is the foot per inch ratio that the model car is designed around?

b) If the wheel of the model car has a diameter of 3 inches, what would the diameter

of the wheel be in real life?

c) Graph the line that models the scale conversion above. Graph inches on the x-axis and feet on the y-axis.

d) Use the graph from part c to estimate the number of inches an 12 foot long real life part would be on the model.

e) Use a proportion to find the exact number of inches an 12 foot long real life part would be on the model.

2) Danielle is taking a road trip. She’s trying to read the map and figure out how many miles her trip will be. On the map, every 4 inches on the map represents 65 miles in real life.

a) What is the miles per inch ratio that the map is designed around?

b) If her trip is approximately 13 inches long on the map, how many miles is her trip in real life?

c) If Danielle travels at a rate of 65 miles per hour, how long should it take her to get to her destination?