Anne wants to buy some revision books and exercise books at a book exhibition. 

She finds that the price of a reference book is \(\text{RM}15\) and the price of exercise book is \(\text{RM}10\).

The maximum amount of money that Anne can spend is \(\text{RM}100\).

Represent the above situation in an appropriate form of linear inequality. 

Solution: 

Let's \(x= \text{reference book}\), \(y= \text{exercise book}\).

Thus, 

\(15x + 10 y\leq100\) or \(10y \leq100-15x\)

• Points that lie in the region above or below a straight line \(y=mx+c\)

• The straight line is drawn using a dashed line

• Points that lie on the straight line\(y=mx +c\) including the region above or below

• The straight line is drawn using a solid line