Unit 3 Mid Quiz: Slope and Slope-Intercept Form -

1. Find the slope of the line. Enter you answer in this format:

m= (a)  

3. Write an equation for the line in slope-intercept form.

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4. Which of the following equations could also be used to describe the graphed line?

• A. 5y = -4x + 20
• B. 5y = -4x - 20
• C. 4y = -5x - 16
• D. 5y = 5x + 20

5. Stan sells hot dogs at the local fair. The graph shows the linear relationship between the money in his cash register and number of hot dogs sold. Find the rate of change.

(a)  

6. Ryan is growing tomato plants in his greenhouse. He purchased a plant from the nursery that was 3.5 inches tall. He tracks the plant’s growth each day. The linear relationship between the plant height and days he has owned the plant is shown in the table below. Find the rate of change of the plant growth each day.

(a)  

7. Find the slope of the line that passes through the points (8, -2) and (-13, 7).

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8. Write an equation in slope-intercept form to represent the linear relationship in the table.

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9. Jaycie has 21 gallons of gas in her car and uses approximately .05 gallons of gas each mile that she drives. Which equation shows the linear relationship between x, the number of miles Jaycie has driven and y, the total gallons of gas in her car?

• A. y = 21x − .05
• B. y = -.05(x + 21)
• C. y = 21 − .05x
• D. y = 21 + .05x

10. The graph represents the number of popcorn pieces on the floor of a movie theater based on the time a crew spent cleaning the theater in minutes. Which of the statements is NOT true?

• A. The crew cleaned 20 pieces of popcorn per minute.
• B. There were initially 100 pieces of popcorn before the crew began cleaning.
• C. It took 5 minutes total for all of the popcorn pieces to be cleaned.
• D. The situation can be represented as f(x) = -20x + 5.

Graph the equation:

y + 3 = -2(x – 7)