Does anyone know the answer to this. i keep getting it wrong

Write the sentence as an equation. b increased by 281 is d

Pleting the square f the given find the x-intercepts of the parabola with vertex (-5,13) and y-intercept (0, 12). write your answer in this form: (14,.99). if necessary, round to the nearest hundredth. *- h enter the correct answer, de verter, and ametry 00000 done doo

How do you find the rate of change using a graph?