Answer:
0. k=2
,
1. k=-3
Step-by-step explanation:
The constant of proportionality is the number that is beside the variable x in both equations.
(1)For the equation:
![y=2x+3](https://img.qammunity.org/2023/formulas/mathematics/high-school/30zzxuyb9lxdanrb1oj8xocd58463jib7b.png)
The constant of proportionality is 2.
(2)For the equation:
![y=-3x-4](https://img.qammunity.org/2023/formulas/mathematics/college/4grex72c9j8xcubnvaxgfy4fpglt6c15oy.png)
The constant of proportionality is -3.