Question

tanvir graphed the relationship between the number of rotations of the screwdriver and the height of a screw head above a piece of wood (in millimeters).
what does the slope represent in this context?
choose 1 answer:
a the number of rotations it takes to change the screw head height by 1 millimeter
b the height of the screw head above the wood before tanvir rotated the screwdriver
c the number of millimeters per rotation that the screw height changes
d none of the above

Explanation:

The slope of a linear graph is calculated as the change in the y-variable divided by the change in the x-variable. Here, the y-variable is screw head height (in mm) and the x-variable is number of rotations. So the slope represents the change in height per rotation.

• Option A describes the reciprocal of the slope.
• Option B describes the y-intercept (the starting height at 0 rotations).
• Option C matches the definition of slope in this context.

Answer:

C. The number of millimeters per rotation that the screw height changes