SAT官方每日一题附答案和解析[数学](2019年7月18日)
日期:2019-07-18 08:05
(单词翻译:单击)
每日一题
Mathematics
](http://upload.kekenet.com/2019/0718/9641563408137.png "SAT官方每日一题附答案和解析[数学](2019年7月18日)")
A line is graphed in the x y-plane as shown. Which of the following could be an equation of the line?
A.-x-3y=-15
B.x-3y=-15
C.x-3y=5
D.-x-3y=5
答案和解析
答案：B
解析：
Option B is correct. Putting this equation into slope-intercept form yields y=1/3x+5. The line that this equation represents has a y-intercept of 5 and a slope of 1/3, which are the same y-intercept and slope as the line given in the xy-plane.
