Question

Two planes are in flight near a local airport. One plane is at an altitude of 2000 meters and is ascending at a rate of 300 meters per minute. The second plane is at an altitude of 7000 meters and is descending at a rate of 800 meters per minute. What is their approximate altitude when they pass one another?

Answer 1

300x+2000=-800x+7000 is approximately 4.5 minutes

remember mx+b

In which: m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.

b is the y-intercept, which is the value of y when x = 0.

Explanation: