We are given price per square yard of a fabric = $1.25.
Let us assume total number of square yard of the fabric = x square yards.
And let us assume function f(x) is given by Total price of the fabric.
Total price of the fabric = Price per square yard of a fabric × total number of square yard of the fabric.
We took total number of square yard of the fabric by a variable x and price per square yard of a fabric is $1.25.
Plugging values in above statement, we get
f(x) = 1.25 × x
f(x) = 1.25x.
