Week 4 Quiz

The bowl-shop line y = 3x + 4 passes through (0, 4) and (2, 10). What is its slope?

Select one.

• 6
• 1⁄3
• 3
• 4

In the line y = −2x + 5, what are the slope and the y-intercept?

Select one.

• Slope −2; y-intercept (0, 5)
• Slope 5; y-intercept (0, −2)
• Slope 2; y-intercept (0, 5)
• Slope −2; y-intercept (5, 0)

One line passes through (0, 4) and (5, 4). Another passes through (6, 0) and (6, 4). Which statement describes the two lines?

Select one.

• The first line is x = 6 with slope 0, and the second is y = 4 with an undefined slope
• The first line is y = 4 with slope 0, and the second is x = 6 with an undefined slope
• Both lines have slope 0, because each pair of points shares a number
• Both lines have an undefined slope, because each pair of points shares a number

Which equation is the line through (−1, 4) and (3, −4), written in slope-intercept form?

Select one.

• y = −2x + 6
• y = −(1⁄2)x + 7⁄2
• y = 2x + 6
• y = −2x + 2

A study group spends a 12-dollar budget on x snacks at 2 dollars each and y drinks at 3 dollars each, so 2x + 3y = 12. What are the two intercepts of this line?

Select one.

• (0, 6) and (4, 0)
• (0, 12) and (12, 0)
• (0, 4) and (6, 0)
• (0, 4) and (0, 6)

What is the slope of the line 2x + 3y = 12?

Select one.

• −2⁄3
• 2
• −3⁄2
• 4

Which pairs of slopes belong to perpendicular lines? Select all that apply.

Select every option that applies.

• 2⁄3 and −3⁄2
• 2⁄3 and −2⁄3
• −2⁄3 and 3⁄2
• 2⁄3 and −4⁄3

True or false: the lines y = 3x + 4 and y = 3x + 7 are parallel.

True or false.

• True
• False

The bowl shop's price for x toppings is g(x) = 3x + 4 dollars. Which statement about g(5) and the graph of g is true?

Select one.

• g(5) = 15, so the point (5, 15) is on the line
• g(5) = 19, so the point (5, 19) is on the line
• g(5) = 19, so the point (19, 5) is on the line
• g(5) = 60, because 3 · 5 · 4 = 60

True or false: the vertical line x = 6 is the graph of a function of x.

True or false.

• True
• False