(D) The altitude of a small airplane in feet. 1, is a function of the time in seconds since the start of its descent, ar. The graph of the linear function passes through the points (6,650) and (8,600) 4) What is the equation of the function? y=-25x+800 4) What is the altitude of the airplane when it starts its descent? square feet

Question

Answer 1

To find the equation of the linear function, we can use the slope-intercept form:

, where

is the slope and

is the y-intercept.Step 1: Find the slope (

) using the given points

and

.The formula for slope is:

Using the points

and

:

Step 2: Use one of the points and the slope to find the y-intercept (

).We can use the point

:

Step 3: Write the equation of the function.The equation of the function is:

Answer 1: The equation of the function is

.To find the altitude of the airplane when it starts its descent, we need to find the value of

when

.Step 4: Substitute

into the equation

.

Answer 2: The altitude of the airplane when it starts its descent is 800 feet.

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