Page 118 - TB_6B

1 . Complete the table. b. An area of a triangle that has a
height of 10 cm and a base of
a. The price of one orange is 3 cm is 15 cm 2.
$1.25.

Number of 1 2 3 4 Length of 3 4 5 6
Orange(s), x 4 base, x

Total Price, 1.25 2.5 3.75 Area, y 15 20 25 30
y

c. An area of a triangle that has a d. The robot moves 7.5 km per
base of 4 cm and a height of hour.
1 cm is 2 cm2.
Hour, x 1 2 3 4
Height, x 1 2 3 4 Total

Area, y 2 Distance, y

Math Story Functions

The word function came from a Latin word functo.
The word function was first used by a German mathematician
G. W. Leibniz, who used it to explain the relationship of the change in the
value of y when the value of x is changed.
The sign to represent a function is f(x), which was first used by a Swiss
mathematician Euler. A French mathematician A. L. Cauchy defined a
function as a relationship between two variables.

28. X and Y 107