If the lengths of two sides of a triangle are 10 meters and 14 meters, which of the following measures is the possible length of the third side?
O 2 meters
O 4 meters
O 22 meters
O 24 meters

C, 22 meters.

The rule is that the two smallest sides need to add up to be greater than the largest side.

2 meters + 10 meters is smaller than 14, so it doesn’t work
4 meters + 10 meters is only equal to 14, so it doesn’t work either
10 meters + 14 meters IS greater than 22, so it does work
10 meters + 14 meters is equal to 24, so it doesn’t work.

almost! for the ones you're missing:

for y=1/2x-3 slope is 1/2, y intercept is -3, x intercept 1/2, and it is linear.

for y=-2x the slope is 2, y intercept would be zero

for the ones who don't have any y intercept defined, it would automatically be zero by the way your teacher might take points off for that