Review

The daily cost of hiring a plumber, y, to work x hours on a repair project can be modeled using a linear function. The plumber charges a fixed cost of $80 plus an additional cost of $45 per hour. Write a linear equation to represent this.

• y = -45x + 80

• y = 45x + 80

• y = 80x + 45

• 45x² + 80x = y

Write this equation in slope-intercept form. 12x - 20 = 4y

• 3x - y = 5

• 12x - 4y = 20

• y = -3x + 5

• y = 3x - 5

What is the definition of a coefficient?

• The letter used to represent a quantity
• The little number or letter used to raise to a power
• The number in front of a variable
• The number in back of a variable

In this expression, 2x + 6y - 10, which are the coefficients?

• 2, 6, and -10
• x and y
• 2 and 6
• -10

What is the definition of a constant?

• The letter used to represent a quantity
• The number with no variable
• The number in front of a variable
• The little number or letter used to raise to a power

What is a synonym for equivalent?

• equal
• difference
• simplify

• Sum
• Difference
• Quotient
• Product

• Sum
• Difference
• Product
• Quotient

• Origin
• Domain
• Like Terms
• Solution

Positive and negative counting numbers including zero

• Integers
• Domain
• Range
• Quadrant