### Home > A2C > Chapter 7 > Lesson 7.3.1 > Problem 7-164

7-164.

Find the equation of the exponential function of the form *y* = *ab ^{x} *that passes through each of the following pairs of points.

(1, 18) and (4, 3888)

Construct two equations by substituting the coordinates

for*x*and*y*.18 =

*ab*^{1}

3888 =*ab*^{4}Use substitution to find the value of

*a*and*b*.*y*= 3(6)^{x}

(−2, −8) and (3, −0.25)

Use the same method as part (a).