3-1 Slope as a Rate of Change

Multiple Choice

A car travels 180 miles in 3 hours. What is the average speed of the car in miles per hour?

• 60 mph

• 45 mph

• 90 mph

• 30 mph

Multiple Choice

If a line in a graph represents the height in inches of a plant over time in days, and the slope of the line is 2, what does the slope tell you?

• The plant loses 2 inches of height each day.

• The plant grows by 2 inches each week.

• The plant grows by 2 inches each day.

• The height of the plant is 2 inches.

Multiple Choice

A coffee shop sells a cup of coffee for $ $$4$$ . What is the slope of the line that represents the money made over cups of coffee sold?

• 1

• 4

• 2

• 8

Multiple Choice

Find the slope of the line that passes through the points (2, 4) and (6, 12)

• 1/2
• -1/2
• 2
• -2

Multiple Choice

Find the slope of the line that passes through (10, -8) and (1, 12).

• 20/9
• -20/9
• 4/9
• 9/4

x and y intercepts

The x-intercept is the point where a line crosses the x-axis, and the y-intercept is the point where a line crosses the y-axis.

Multiple Choice

_{What is the y-intercept of the line?}

•  (0,¹/₂)
• (0,1)
• (0, ^-1/2)
• (0, -1)

Multiple Choice

^{What is the x- intercept of the line?}

• (1, 0)
• (2, 0)
• ( -1, 0)
• (-2, 0)

Multiple Choice

What is the y-intercept?

• (0,7)
• (0, 0)
• (0,1)
• (0, 2)

Multiple Choice

What is the x-intercept?

• 12
• -3
• 8
• 0

Multiple Choice

What is the slope-intercept form of a linear equation?

• y = ax + b

• y = mx - b

• y = mx^2 + b

• y = mx + b