Interactive practice questions
Justin is looking into the details of his mobile phone plan. He knows the costs for several call lengths.
| Length of call ($t$t minutes) | $2$2 | $6$6 | $10$10 | $14$14 |
|---|---|---|---|---|
| Cost ($C$C) | $\$1.00$$1.00 | $\$2.20$$2.20 | $\$3.40$$3.40 | $\$4.60$$4.60 |
a
Plot the given data in the table on the number plane.
Loading Graph...
b
Is this relationship linear?
Yes
A
No
B
c
Draw the line that connects the points.
Loading Graph...
d
According to the graph, how much will it cost to make a $8$8-minute call?
e
According to the graph, what is the length of a call that costs $\$1.60$$1.60?
f
What is the rule that connects the cost of a call, $C$C, to the length of the call, $t$t?
Easy
8min
A racing car starts the race with $250$250 litres of fuel. From there, it uses fuel at a rate of $5$5 litres per minute.
Easy
3min
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