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 |
Plot the given data in the table on the number plane.
Is this relationship linear?
Yes
No
Draw the line that connects the points.
According to the graph, how much will it cost to make a $8$8-minute call?
According to the graph, what is the length of a call that costs $\$1.60$$1.60?
What is the rule that connects the cost of a call, $C$C, to the length of the call, $t$t?
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.