Page 67 - Math Smart - 7
P. 67
O Complete the mapping diagrams,
1
a) A" —7a - b) A—>3(a + 1) c) .j: A +
3
Input Output Input Output Input Output
N
f \ f' N, ^
53 5 3
9 27 6
81 12 13
15 78 12
L J k J k J V J k y
Investigate!
Cheng, Mila and Reza are asked to write down the function of this
function machine.
a) 5
13 21
19 36
Cheng says, "I think the function is 'multiply by 2 and then subtract 2"'.
Mila says, "I think the function is 'multiply by 2 and then subtract 5"'.
Reza says, "I think the function is 'subtract 3 and then multiply by 2"'.
Who is correct?
O Find the function for each of these mappings.
Write each answer in the form 'a —>■
a) b)
Input Output Input Output
\
^
r N
20 15 6
21 16 5 10
22 17 4 14
23 18 5 18
J
J
k ) L V k
J
o
