A line passes through points E (3, 5) and F (-2, 9) on a grid. Line AB is perpendicular to this line.?

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What is the rate of change of line AB?

2007-10-05 08:20:59 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

The idea you need is this: since AB is perpendicular to EF, the slope (rate of change) of AB = -1/slope(EF).

2007-10-05 08:26:43 · answer #1 · answered by Tony 7 · 1⤊ 0⤋

the answer is 5/4.
the answer to perpendicular is oppposite slope.
you have to flip EF's slope and negate it.

imsure

2007-10-05 15:30:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋