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Home > CCA2 > Chapter 7 > Lesson 7.2.1 > Problem 7-121

7-121.
  1. Find the equation of the exponential function of the form y = abx that passes through each of the following pairs of points. Homework Help ✎

    1. (1, 18) and (4, 3888)

    2. (–2, –8) and (3, –0.25)

Construct two equations by substituting the coordinates
for x and y.

18 = ab1
3888 = ab4

Use substitution to find the value of a and b.

y = 3(6)x

Use the same method as part (a).