Answer:
fx =1; then fx =2; then fx =4
Step-by-step explanation:
then plug the coordinates in as x is horizontal bar in top right then the fx
a) What is the cost of an advertisement of 15 words for one week?
b) What is the greatest number of words in an advertisement costing up to $8 for one week?
c) If an advertisement is run for two weeks, the cost for the second week is reduced by 30%. Calculate the total cost for an advertisement of 22 words for two weeks.
Answer:
a) 495 cents
b) 25 words
c) 1174.7 cents
Step-by-step explanation:
a) The cost is equal to 28 x 15 + 75 which equals 420 + 75 which equals 495 cents.
b) (800 cents - 75) divided by 28
= 725 / 28
= 25.9
Since you cannot have 0.9 of a word it is rounded down to 25.
c) 22 words in the first week will cost 22 x 28 + 75 = 616 + 75 = 691 cents
In the second week it will cost 30% less which means it will only cost 70% of the ordinary price. Therefore the second week will cost:
0.7 x 691 = 483.7 cents
Total = 483.7 + 691
= 1174.7 cents
Hope this helps :)
Changes in output are evenly spaced for evenly spaced changes in input, so the rule is linear. Changes in output are 1 for changes in input of 3, so the rule involves a factor of 1/3. One possible rule is
... output = (1/3)·input + 3
If y and x are used to represent output and input, respectively, this is
... y = (1/3)x + 3