Preparation for next lesson

Dear S1-02

Please take a look at the following questions (and if you could, attempt them):

If y is directly proportional to x and y = 8 and x = 5,
(a) find the equation connecting x and y
(b) sketch the graph representing the relationship
(c) find the value of y when x = 10

The expenses, E, at a tea party, is directly proportional to the number of guests, N present. The expenses for 40 guests was found to be $320. Find
(a) the equation connecting E and N
(b) the expenses of 120 guests
(c) the number of guests if the expenses is $720
(d) the cost per person

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