On which axis does the point (0, - 12) lie?
A. positive x-axis
B. negative x-axis
C. negative y-axis
D. positive y-axis

Part 21 of 25 -
4.0/ 4.0 Points
Question 21 of 25
4.0/ 4.0 Points
Complete the three ordered pairs (3, ), (8, ), (0, )
so that they are solutions to the equation:
x + y = 8

Feedback: Correct! You replace the x in the equation with the first coordinate of each of the ordered
pair to solve for each corresponding y.
E. (3, 3), (8, 8), (0, 0)
Part 22 of 25 -
4.0/ 4.0 Points
Question 22 of 25
4.0/ 4.0 Points
Two lines have the same slope and different y-intercepts, how many points do they have in common?

Part 23 of 25 -
4.0/ 4.0 Points
Question 23 of 25
4.0/ 4.0 Points
Calculate the slope of the line between the points (0, 0) and (4, 4/9)

C. Slope is 9
D. Slope is 1/9
Part 24 of 25 -
2.0/ 4.0 Points
Question 24 of 25
2.0/ 4.0 Points
Find the slope and the y-intercept. Be sure to write the y-intercept as an ordered pair - in parentheses
and with commas between the coordinates.
y = 7x
Slope is 7
and y-intercept is 0
.
(0,0)
Feedback: Once the equation is written in slope-intercept form, the coefficient of x is the slope and
the constant is the y-coordinate of the y-intercept. Always be sure to show the y-intercept as an
ordered pair in parentheses and with a comma between the coordinates!

Part 25 of 25 -
4.0/ 4.0 Points
Question 25 of 25
4.0/ 4.0 Points
Solve for y:
21x + 7y = 28

E. y = 3x + 25