### Home > A2C > Chapter 13 > Lesson 13.2.1 > Problem 13-105

13-105.

Given the points (2, 9) and (4, 324): Homework Help ✎

Write the equation of a line that passes through them.

Write the equation of an exponential function with an asymptote at

*y*= 0 that passes through them.

Using the slope-intercept form of a line and a given point, find *b*.

Use *y* = *km ^{x}* and substitute the values for

*x*and

*y*from both points, creating two equations.

Now divide the equations and solve for *m*.

Now that you know *m*, find the value of *k*.

*y* = 0.25(6)^{x}