Given: a = {(0, 0), (2, 1), (3, 1.5), (4, 2), . .} is a a function and why?

A is a function and  each has image and this image is unique.

Step-by-step explanation:

Her in each ordered pair  the first number is called domain and range is formed second element of each ordered pair.

A  relation is said to be function if for each element  has image and this image is unique

Here we can see that each element  has image ( because of ordered pair)

and this image is unique for each number.

more over  ,we can see that second number is half of first one. and we know that half of a number is unique .

So its a function

exactly you go it

step-by-step explanation:

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!