SAT Math Question of the Day

Math Category: Geometric Slope:

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

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

UNANSWERED.

The correct answer is A.

A: The answer is -4/7.
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. m is -4/7, so that's the slope of the line.