Rosa bought 70 feet of cable for $14.70. She needs 30 more feet. If the unit price is the same, how much will she pay for the extra 30 feet of cable?

30 more feet will cost 6.30$

Step-by-step explanation:

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$6.30

Step-by-step explanation:

First you divide 14.70 by 70 (14.70÷70= 0.21)

This means 0.21 is your unit price

Secondly you multiply 0.21 and 30 (0.21×30= 6.30)

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

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step-by-step explanation: