A bar graph titled Acceleration versus Mass with Mass in kilograms on the x axis with labels 2, 4, and 6. Acceleration in meters per second squared is on the y axis numbered 0 to 16. The low bar goes up to 8.5, the medium bar goes up to 12, and the high bar goes up to 14. The graph shows the acceleration of the cart as the mass of the cart varies.

As the mass of the cart increases, the acceleration of the cart
.

The type of relationship that exists between the mass of the cart and the acceleration of the cart is
relationship.