Semester Exam Review1

A linear function in two variables is given below.

3x - 4y = 24

Which of the following is true about the equation?

(Check all that apply.)

• The y-intercept is (0, -6) and the zero is x = 8.

• The y-intercept (0, 6) and the zero is x = 8.

• The slope is -3/4.

• The x-intercept is (8, 0).

• The slope is 3/4.

Given the points (-11, 5) and (-6, 1), which of the following is true?

(Check all that apply.)

• The slope is -4/5.

• The slope-intercept form of the equation is y = -4/5x - 3.8.

• The standard form of the equation is 4x + 5y = -19.

• The slope is -5/4.

• The standard form of the equation is 4x + 5y = 19.

Given the equation y + 2x = 4, which of the following is true?

(Check all that apply.)

• The slope is -2.

• The y-intercept is (0, 4) and the zero is x = 2.

• The slope is 2.

• The y-intercept is (0, 2) and the zero is x = 4.

• The slope is 1/2.

Simplify each expression.

(4x² - 8y² + 4z²) - (8x² + 4y² + z²)

• -4x² - 12y² + 3z²

• -4x² - 4y² + 3z²

• -6x² - 8y² + 3z²

• -7x² - 4y² + 3z²

Find the sum.

(4y² -4y + 2y³ + 8) + (3y² + y³ - 5)

• 3y³ + 7y² - 4y + 3

• 4y² + 3y³ - y + 3

• -y⁴ + 2y³ -y - 4

• 4y³ + 3y² -3y + 1

Find the sum.

(2x² + 5y² - 7z² ) + ( 3z² - 4x² + 6y² )

• 2x² + 3y² +1z²

• -2x² - 11y² - 4z²

• 2x²+ 5y² - 7z²

• -2x² + 11y² - 4z²

A restaurant sells pizza for the prices in the data table.  Calculate the linear regression equation of the data.

• y = 1.5x + 12
• y = 12x + 1.5
• y = 0.67x - 8
• y = -8x + 0.67

Tags

CCSS.8.EE.C.8C

Which of these represents the rate of change of the dollars earned with respect to hours worked?

• $100 per hour worked

• $50 per hour worked

• $62.50 per hour worked

• $67 per hour worked

A person travels by car.  They record their miles driven in a data table.  Calculate the linear regression equation of this data.

• y = 61.93x - 1.79
• y = -1.79x + 61.93
• y = 0.016x + 0.03
• y = 0.03x + 0.016

Tags

CCSS.HSF-LE.A.1B

If f(x) = x, what is the equation for y = f(2x)?

• y = (2x)

• y = x + 2

• y = (x + 2)

• y = 2x