SAT Math Question of the Day

Q: What is the y-intercept of 7(3 - y) = 4(x - 1)?

1. -4/7
2. 4/7
3. 7/4
4. 25/7
5. 25/4

UNANSWERED.

The correct answer is D.

A: The answer is 25/7.
First solve for y.
7(3 - y) = 4(x - 1)
21 - 7y = 4x - 4
-7y = 4x - 25
y = -4/7x + 25/7
The line is now in the y = mx + b format. m is the slope of the line and b is the y-intercept. b is 25/7, so that's the y-intercept of the line.