Posted - 01/08/2009 : 16:11:53 From the Official SAT Study Guide p. 398:12

x f(x) 0 a 1 24 2 b

The table above shows some values for the function f. If f is a linear function, what is the value of a + b?

Multiple Choice answers:

a) 24 B) 36 C) 48 D) 72 E) It cannot be determined from the information given

I have no idea how the answer C)48 was reached!!

2 L A T E S T R E P L I E S (Newest First)

mingshum

Posted - 01/09/2009 : 19:37:36 Thank you Royhass.

royhaas

Posted - 01/08/2009 : 16:53:51 If it's linear, then it has a constant slope. The change in x is 1 unit, and the change in f(x) satisfies 24 - a = b - 24.