Linear Models

The cost of hiring a private tutor is modeled by the function C(n)=32n+20. How many hour did the tutor work to earn $212?

• 4 hours

• 6 hours

• 5 hours

• 7 hours

• There is a $5 initial charge and an additional charge of $2 per copy.

• There is a $2 initial charge and an additional charge of $5 per copy.

• The company charges $5 for every 2 copies.

• The company charges $2 for every 5 copies.

• Hot dogs cost $2.

• Peanuts cost $3.

• The vendor wants to sell more than $96 worth of snacks.

• The vendor wants to sell at least $96 worth of snacks.

The inequality $3x+2y>96$ approximately models the projected sales for a stadium vendor if she sells more than $96 of snacks during the game and is represented in the graph. Which statement is true?

• The line is dashed and shaded above the line because it is greater than but not equal to $96.

• The line is dashed because all inequalities are dashed to designate the difference between an inequality and a line.

• The graph is shaded above the line so you can clearly see the combinations below the line.

• Based on the inequality and associated graph, the vendor is only trying to sell up to $96 worth of snacks.

Which of the following equations represents the line that has a y-intercept of (0, -2) and x-intercept of (3 , 0)?

Which is the equation of the graph?

• 
• 
• 
• 

• There are between 20 and 28 people in the room.

• There are 60 people in the room during that interval.

• No people enter or leave the room during that interval.

• This interval represents the time during which there are the most people in the room.

Which equation models the relationship between shipping fee and number of items?

This table shows the relationship between humerus

(arm bone) length and a woman’s height.

Predict the height of a woman whose humerus length

is 40 cm.

• 176 cm

• 178.75 cm

• 173.25 cm

• 181.5 cm