### Home > PC3 > Chapter 4 > Lesson 4.3.2 > Problem 4-126

4-126.

Write an equation for an exponential function of the form that passes through the points

Write a system of two equations by replacing

andwith the coordinates of the two given points.Solve for

in terms ofin one equation. Substitute this value into the other equation to obtain one equation with a single variable,.Solve your equation from part (b) for

.Use the value of

from part (c) to determine the value of.Write the final equation.