Topic 5: MAFS.8.SP.1.3 – Worksheet 1

The slope of the line of best fit is 3/4. Using the data from the table, determine if the statement is true or false.

After 3/4  hour the rainfall begins.  

• True

• False

The slope of the line of best fit is 3/4. Using the data from the table, determine if the statement is true or false.

It rains exactly 3/4  inches each hour. 

• True

• False

The slope of the line of best fit is 3/4. Using the data from the table, determine if the statement is true or false.

The rainfall amount increases each hour.  

• True

• False

The slope of the line of best fit is 3/4. Using the data from the table, determine if the statement is true or false.

At 7 hours there should be exactly 4.75 inches of rain.

• True

• False

The slope of the line of best fit is 3/4. Using the data from the table, determine if the statement is true or false.

The rainfall is accumulating at about 3/4  inches per hour.  

• True

• False

The typical amount of money Blain earns as a service technician after 𝑥 hours is modeled by the equation 𝑦 = $20𝑥 + 100. Below is Blain’s actual earns for his last 9 service calls.

The $20 in this model represents how much Blain...

• earns the first hour.

• earns per hour.

• earns in total.

Tricia rents out her Key Largo vacation house. The amount of money Tricia receives is modeled by the equation 𝑟 = $150𝑑 + 100. Tricia charges a cleaning service fee for each visit. Guest pay $150 a day. Let 𝑑 represent the number of days the rental is rented and r represent the total revenue.

$100 represents which of the following...

SELECT ALL THAT APPLY

• The daily rent.

• The cleaning fee.

• The slope.

• The y-intercept.

Tricia rents out her Key Largo vacation house. The amount of money Tricia receives is modeled by the equation 𝑟 = $150𝑑 + 100. Tricia charges a cleaning service fee for each visit. Guest pay $150 a day. Let 𝑑 represent the number of days the rental is rented and r represent the total revenue.

$150 represents which of the following...

SELECT ALL THAT APPLY

• The daily rent.

• The cleaning fee.

• The slope.

• The y-intercept.

The equation of the line of best fit for the data shown is p=1/2t.

Which explanation best describes why this line of best fit can be used to represent the data?

• The line of best fit can be used to represent the data because it passes through the point (95, 17).

• The line of best fit can be used to represent the data because the data has a constant rate of change.

• The line of best fit can be used to represent the data because it is linear and passes through all of the data points.

• The line of best fit can be used to represent the data because it averages out the errors and allows for making predictions.

Farmer Ken plants rose seeds. Each year he estimates that he loses 500 plants from his crop due to pests. Farmer Ken’s crop is modeled by the equation

𝑦 = 125𝑑 − 500, where d represents the days he plants and y represents the total crop for the year.

True or False:

Famer Ken’s yearly crops decrease 125 plants per day and decrease 500 plants each year.

• True

• False