2019新SAT数学练习题及答案解析2

>>SAT考试模拟题：2019新SAT数学练习题及答案解析2

>>SAT考试经典课程推荐

Line £ is graphed in the xv-plane below.

If line l is translated up 5 units and right 7 units, then what is the slope of the new line?

Content: Heart of Algebra

Key: B

Objective: You must make a connection between the graphical form of a relationship and a numerical description of a key feature.

Explanation: Choice B is correct. The slope of a line can be determined by finding the difference in the y-coordinates divided by the difference in the x-coordinates for any two points on the line. Using the points indicated, the slope of line l is - . Translating line l moves all the points on the line the same distance in the same direction, and the image will be a line parallel to £. Therefore, the slope of the image is also - .

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