Question

Cassie starts at point C and adds

to that point to get her new point. Kevin starts at point K and subtracts

from that point to get his new point.

A number line between -4 and 4 in increments of 1 has point C between -2 and -1, and point K at 3.

Which statement about Cassie’s and Kevin’s new points is correct?


Cassie’s new point is at –1 and Kevin’s new point is at

.


Cassie’s new point is at –1 and Kevin’s new point is at

.


Cassie’s new point is at –2 and Kevin’s new point is at

.


Cassie’s new point is at

and Kevin’s new point is at

.

Answer 1

If C is at -3/2 and she adds 1/2: -3/2 + 1/2 = -1.
If K is at 3 and he subtracts 7/4: 3 - 7/4 = 12/4 - 7/4 = 5/4.

So Cassie’s new point is at -1 and Kevin’s new point is at 5/4 (1 1/4).