Determine whether each of the tables below "does" or "does not" show a proportional relationship. If so, determine the constant of proportionality (k). I WILL GIVE BRAINLIEST ONLY IF UR CORRECT.

1) does k = 1

2) does k = -0.8

3) does k = 1

4) does not

Step-by-step explanation:

1) plot the point and solve the line to get y = x-2 so k = 1

2) plot the point and solve the line to get y = -0.8x so k = -0.8

3) plot the point and solve the line to get y = x + 9 so k = 1

4) plot the points and theres no straight line that goes through the points so it does not show a proportional relationship

16

step-by-step explanation:

2 x 40 = 80

80/5

= 16