Activity 2.1Spending and Earning Money

• In your groups read page 181 and complete questions 1, 2 and 3

• Definition– A sum function is when you add two functions

together– S(x) = (f + g)(x) = f(x) + g(x)

• Skip problem 4

• In your groups complete problems 5, 6 and 7

• Definition– A difference function is when you subtract one

function from another– D(x) = (f - g)(x) = f(x) - g(x)

• Complete the graph in number 8 and use it to answer the rest of the questions in 8

• Definition– A function that is formed by adding or subtracting terms

of the form axn, where a is a real number and n is a nonnegative integer, is called a polynomial expression in x

– Examples• x, 14, x2-3x+1

• Skip to addition and subtraction of polynomial expressions and do problem 11

• Time permitting go back and complete exercises 9 and 10