Question 1 (

5pts

)

a)Maria is climbing a mountain. Maria's elevation , in feet after in feet after minutes is given by Write a complete sentence describing Maria's starting elevation and how it is changing over time. (3pts)

b)A Sonya is currently 10 miles from home and is walking farther away at 2 miles per hour. give an equation for her distance from home t hours from now. (2pts)

Question 2 (

21pts

)

For the following questions, consider this scenario: The weight of a newborn was 7.5 pounds. The baby gained one-half pound a month for its first year.

a)Find the linear function that models the baby's weight as a function of the age of the baby, in months, (2pts)

b)Find a reasonable domain and range for the function (5pts)

c)If the function is graphed, find and interpret the t- and W-intercepts. (5pts)

d)If the function W is graphed, find and interpret the slope of the function. (3pts)

e)When did the baby weight 10.4 pounds? (3pts)

f)What was the baby's weight when at 6.2 months? Interpret your answer.(3pts)

Question 3 (

9pts

)

When temperature is 0 degrees Celsius, the Fahrenheit temperature is 32. When the Celsius temperature is 100, the corresponding Fahrenheit temperature is 212.Express the Fahrenheit temperature as a linear function of the Celsius temperature,

a)Find the rate of change of Fahrenheit temperature for each unit change temperature of Celsius. (3pts)

b)Find and interpret (3pts)

c)Find and interpret (3pts)

Question 4 (

5pts

)

A cell phone company offers two plans for text messaging.

Plan A: $15 per month and $2 for every 300 texts.

Plan B: $25 per month and $0.50 for every 100 texts.

Required

How many texts would you need to send per month for plan B to save you money?

Question 5 (

5pts each

)

Use the graph below which shows the profit, in thousands of dollars, of a company in a given year, where represents the number of years since 1980 to answer the following questions:

Required

a)Find the linear function where depends on the number of years since 1980.

b)Find and interpret the y-intercept.

c)Find and interpret the t-intercept.

d)Find and interpret the slope