A research ship lowers a probe into the ocean to explore an underwater trench. The probe starts on a crane 16 feet above the surface and is lowered at a rate of 9.2 feet per minute. Write an expression for the depth of the probe after m minutes. What is the depth of the probe after 30 minutes?

9.2 is rate depth increases per minute. This is same as slope (change in depth over change in time).

The surface of ocean is equal to depth of 0. Initial depth = -16 because it starts 16 ft ABOVE ocean. This is also when m = 0, similar to the "y-intercept"

Now we can write our function:
[tex]D = 9.2m -16[/tex]

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A research ship lowers a probe into the ocean to explore an underwater trench. The probe starts on a crane 16 feet above the surface and is lowered at a rate of 9.2 feet per minute. Write an expression for the depth of the probe after m minutes. What is the depth of the probe after 30 ​minutes?

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A research ship lowers a probe into the ocean to explore an underwater trench. The probe starts on a crane 16 feet above the surface and is lowered at a rate of 9.2 feet per minute. Write an expression for the depth of the probe after m minutes. What is the depth of the probe after 30 minutes?