I need help this is dude tomorrow

What is the multiplicative rate of change of the exponential function shown on the graph?

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left