The following are true of an additive relationship:
Situation: John will always be four years older than Sue.
This table shows an additive relationship between x and y, represented with y = x + 4.
Situation: To recreate the recipe, the amount of sugar must always be 12 times the amount of salt. This is a multiplicative relationship. It can be written y = ax, where y is related to x through multiplication by a constant, a.
TEKS: 5(4)(C), 5(4)(D), 6(4)(A), 6(6)(C)