Unit 3 Mid-Quiz

The name of the following formula is what?

(y - y₁) = m (x - x₁)

• Slope-Intercept Form

• Point-Slope Form

• Slope Formula

• Pythagorean Theorem

What is the slope of the following equation?

y = -(5/6)x + 4

• • -(5/6)

• 4

• -5

• -6

Mathematical Equivalence

ON

A contractor's total earnings from a job include a fixed amount plus an amount based on the number of hours worked. The values in the table represent the linear relationship between the number of hours worked and the contractor's total earnings.

What is the rate of change in the contractor's total earnings in dollars with respect to the total number of hours worked?

• $20 per hour worked

• $10 per hour worked

• $9.25 per hour worked

• $8.75 per hour worked

• -15

• -10

• 2

• 10

The graph of linear function "g" passes through the points (-7,-4) and (7,6) as shown:

What are the slope and y-intercept of the graph of "g"?​ ​ (a)   ​ ​ (b)  

• 1
• -1
• 0

At a restaurant jars of tomato sauce are stored in a pantry. Each box contains 8 jars of tomato sauce. A cook uses 2 jars from one of the boxes.

Which equation shows the relationship between y, the total number of jars of tomato sauce remaining in the pantry, and x, the number of boxes in the pantry?

• y = 8x + 6

• y = 8x

• y = 8x - 2

• y = 6x

A cell phone company offers two monthly plans. Subscribers to Plan A pay a monthly fee of $15, and are charged 4 cents for every minute of cell phone usage. Subscribers to the second plan, Plan B, pay a monthly fee of $10, and are charged 5 cents for every minute of cell phone usage.

Martha can afford no more than $40 per month for a cell phone plan. Which plan should she choose?

• Plan A, because she would get up to 625 minutes of monthly cell phone usage

• Plan A, because she would get up to 650 minutes of monthly cell phone usage

• Plan B, because she would get up to 600 minutes of monthly cell phone usage

• Plan B, because she would get up to 675 minutes of monthly cell phone usage