18. Find the inverse of { (4, - 1), (3, - 2), (6, 9), (8, 5) }.

F. { (8, 5), (6, 9), (3, - 2), (4, - 1) }

H. { (-1, 4), (-2, 3), (9, 6), (5, 8) }

G. { (-4, 1), (-3, 2), (-6, - 9), (-8, - 5) }

J. { (-1, - 2), (9, 5), (4, 3), (6, 8) } 19.

19.

If f (x) = 3x - 4, find f - 1 (x).

A f - 1 (x) = 4x - 3 B f - 1 (x) = - x + 4 3 C f - 1 (x) = - x - 4 3

D f - 1 (x) = - 4 - 3x 20. If f (x) = 8 (5x - 2), find f - 1 (x).

F f - 1 (x) = - 5x + 2 8 G f - 1 (x) = - 5x - 2 8 H f - 1 (x) = - x - 16 40

J f - 1 (x) = -

Question

Ciara Dyer

Mathematics

15 November, 04:37

18. Find the inverse of { (4, - 1), (3, - 2), (6, 9), (8, 5) }.

F. { (8, 5), (6, 9), (3, - 2), (4, - 1) }

H. { (-1, 4), (-2, 3), (9, 6), (5, 8) }

G. { (-4, 1), (-3, 2), (-6, - 9), (-8, - 5) }

J. { (-1, - 2), (9, 5), (4, 3), (6, 8) } 19.

19.

If f (x) = 3x - 4, find f - 1 (x).

A f - 1 (x) = 4x - 3 B f - 1 (x) = - x + 4 3 C f - 1 (x) = - x - 4 3

D f - 1 (x) = - 4 - 3x 20. If f (x) = 8 (5x - 2), find f - 1 (x).

F f - 1 (x) = - 5x + 2 8 G f - 1 (x) = - 5x - 2 8 H f - 1 (x) = - x - 16 40

J f - 1 (x) = -

+1

Answers (1)

Know the Answer?

Raina Keith · Answer 1

An inverse function will simply reverse the coordinate pairs of the original function. If f (x) = (x, y), f^ - (x) = (y, x).

So 18 is H

...

If f (x) = y=3x-4, to find the inverse function, solve for x, and then reverse the labels as seen below ...

y=3x-4

y+4=3x

(y+4) / 3=x so the inverse function is:

y = (x+4) / 3