可汗学院新
11. Which of the following equations represents the line graphed BELOW in the xy-plane?
A. x=-4
B. y=-4
C. y=x-4
D. x=y-4
Correct Answer: B Difficult level: 2
12. Which of the following equations represents a line in the xy-plane with an x-intercept at (?2,0) and a slope of 4?
A. y=4x+8
B. y=-4x+8
C. y=4x-2
D. y=-4-2
Correct Answer: A Difficult level: 2
13. Which of the following equations represents a line in the xy-plane with an x-intercept at (?15,0) and a y-intercept at (0,?9)?
15. A rectangle is said to have a golden ratio if the ratio of its length to width is equal to approximately 1.6. Which of the following graphs represents the relationship between length, l, and width, w, in a golden rectangle?