In the xy-plane, a line has slope 3 and x-intercept 3. What is the y-intercept of the line?
A. -9
B. -3
C. 0
D. 3
E. 9
Source:GMATPrep EP2
OA:A
A. -9
B. -3
C. 0
D. 3
E. 9
Source:GMATPrep EP2
OA:A
Hi NandishSS,
You can deal with this prompt by either drawing a picture or by just creating an equation based on the facts that you know.
The slope-intercept formula for a line is Y = MX + B
From the prompt, we know that the slope is 3 and the X-INTERCEPT is 3 (meaning that X=3 when Y=0)
Y = MX + B
Y = 3X + B
0 = 3(3) + B
0 = 9 + B
-9 = B
So the Y-intercept is -9
Final Answer: E
GMAT assassins aren't born, they're made,
Rich
