the graph shows the annual heart attack rate per 10,000 men as a function of blood cholesterol level . Use the graph to approximate the annual heart attack rate per 10,000 men for those whose blood cholesterol level is 250mg/dl.

To approximate the annual heart attack rate per 10,000 men for those with a blood cholesterol level of 250 mg/dL, you will need to use the given graph.

Here are the steps to follow:

1. Locate the x-axis of the graph, which represents the blood cholesterol level. Find the point where the x-value is equal to 250 mg/dL.

2. Move vertically upwards or downwards from the point on the x-axis to the corresponding point on the y-axis. This will give you the heart attack rate.

3. Read the specific value on the y-axis that represents the heart attack rate per 10,000 men.

4. That value will approximate the annual heart attack rate per 10,000 men for those with a blood cholesterol level of 250 mg/dL.

Note: Make sure to use the graph's scale and gridlines to estimate the value as accurately as possible.