1. The problem asks us to compare the rates of change (slopes) of two linear functions, M and P.
2. Function P is given by the equation $$y = 7x + 9$$, so its rate of change (slope) is directly visible as 7.
3. To find the rate of change of Function M, we use the formula for slope between two points $$(x_1, y_1)$$ and $$(x_2, y_2)$$:
$$\text{slope} = \frac{y_2 - y_1}{x_2 - x_1}$$
4. Using points from Function M, for example, $(-2, -9)$$ and $$(0, 1)$$:
$$\text{slope}_M = \frac{1 - (-9)}{0 - (-2)} = \frac{1 + 9}{0 + 2} = \frac{10}{2} = 5$$
5. We can verify with another pair to confirm the slope is consistent:
Between $$(0, 1)$$ and $$(2, 11)$$:
$$\text{slope}_M = \frac{11 - 1}{2 - 0} = \frac{10}{2} = 5$$
6. So, the rate of change of Function M is 5.
7. Now, compare the slopes:
- Function M slope = 5
- Function P slope = 7
8. The difference in their rates of change is:
$$7 - 5 = 2$$
9. Therefore, the correct statement is:
B Their rates of change differ by 2.
Rate Change 927073
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