1. Hazim has signed up a postpaid mobile plan with Nexus Telco Sdn. Bhd. The monthly cost, ? of the plan (in RM) is given by the function ?(?) = 0.30? + 7, where ? is the number of minutes used for calls. a. What is the cost of the plan in June 2020 if he talks for 7 minutes everyday? b. If the bill for July 2020 is RM 190, how many minutes were used in that month? c. What is the maximum number of minutes that can be used monthly for RM 220? d. In August 2020, the fixed cost has been increased from RM 7 to RM 12. Write the new function of the mobile plan cost and sketch its graph.
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
1. Hazim has signed up a postpaid mobile plan with Nexus Telco Sdn. Bhd. The monthly
cost, ? of the plan (in RM) is given by the function ?(?) = 0.30? + 7, where ? is the
number of minutes used for calls.
a. What is the cost of the plan in June 2020 if he talks for 7 minutes everyday?
b. If the bill for July 2020 is RM 190, how many minutes were used in that month?
c. What is the maximum number of minutes that can be used monthly for RM 220?
d. In August 2020, the fixed cost has been increased from RM 7 to RM 12. Write the new function of the mobile plan cost and sketch its graph.
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