Variable a is 4 more than variable b. Variable a is also 1 less than b. Which of the following pairs of equations best models the relationship between a and b? (4 points)

Question

a = b + 4
a = b − 1

a = 4b
a = b + 1

b = a + 4
b = a − 1

b = 4a
b = a + 1

Answer 1

The correct pair of equations that best models the relationship between a and b is:

a = b − 1
b = a + 4