a. the y-intercept is 4500 ft. the y-intercept means that the skydiver is 4500ft off the ground at that time
b. the slope of the line is -4/2 the skydiver is descending at 1500ft per minute
c. the x-intercept is 3 which means the skydiver it the ground at the 3 minute mark
d. the equation for this line is Y=-4/2x+4500
I hope I've helped!