Question

PLEASE HELPConsider the following graphs. i attached the graphs below

Determine the rate of change shown in each graph and determine if each is positive or negative.
Restate the rate of change as a unit rate for each graph. Explain its meaning.
Tell whether the graphs represent proportional relationships. Explain your reasoning.

Answer 1

Graph A:

Rate of change = -30 feet/sec (negative rate of change)

The elevation decreases 30 feet every second.

f = 240 - 30s

This graph does not represent a proportional relationship because the origin is not on the line.

Graph B:

Rate of change = 2.5 cups/loaf (positive rate of change)

Each loaf requires 2.5 cups.

c = 2.5l

This graph represents a proportional relationship because the origin is on the line.