Which of these can not be negative?
a. acceleration and momentum.
b. speed and velocity.
c. distance and speed.
d. displacement and distance.

Any quantity that has a direction (a 'vector' quantity) is negative
whenever it happens to be opposite to the direction you call positive.

Acceleration, momentum, velocity, and displacement are all vectors.

The only choice that doesn't include anything with direction is 'C'.

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.