Additional Practice

. The line models the height of a glider y, in feet, over x hours. a. Find the y-intercept of the graph.

• 1500 feet

• 3500 feet

• 2500 feet

. Which graph represents a proportional relationship? Explain

• A

• B

• C

Find the y-intercept for the line

• -6

• -5

• -1

The y-intercept is the point where the graph crosses the................. -axis

• y

• x

Which statement describes the y-intercept of the graph of a proportional relationship?

• 𝖠 It is equal to the x-intercept of the line.

• 𝖡 It is greater than the x-intercept of the line

• 𝖢 The line intersects the y-axis of the graph at the origin.

• 𝖣 The line intersects the y-axis of the graph above the origin.

. Which graph has a y-intercept of -5? Explain.

• A

• B

Write an equation in the form y = mx for the proportional relationship that passes through the points (2, -15) and (6, -45).

• y = −8.5x

• y = −7.5x

• y = −6.5x

Use the points (5, 1,273) and (10, 2,546) to write an equation for the line.

• y = 254.6x

• y = 244.6x

Bus X travels 224 miles in 4 hours. Write the equation of the line that describes the relationship between distance y and time x.

• y = 56x

• y = 55x

In the equation y = 14x, what is the constant of proportionality?

• x

• y

• 14