Answer:
use the slope formula!
Step-by-step explanation:
Rate of change is basically slope
you have to use the slope formula y2-y1/x2-x1
for example in the first question on the left 30-15 ÷ 5-2 = 5
would you like me to do the rest?
Answer:
If it cost Hudson $28.20 to send 188 text messages, it would cost $9.45 to send 65 text messages. So the answer would be $9.45.
Step-by-step explanation:
Let me explain why. The answer is 9.45 because, 28.20 divided by 188 is 0.15. Then, if you multiply 0.15 by 63 you get 9.45.
28.20/188=.15
.15x63=9.45
So yeah, that's why if it cost Hudson $28.20 for 188 messages, it would be $9.45 to send 65 messages. So again, the answer is 9.45. I hope this was helpful and makes you understand it more now. :D
By hypothesis, each minute of local calls costs $0.05
So x minutes of local calls will cost 0.05x : You just multiply the cost of 1 minute by the total amount of minutes.
Same thing for long distances calls: Each minute costs $0.12, so y minutes of long distance calls will cost 0.12x
So to get your total charge (local calls + long distance calls), you just need to add the charges for local calls with the charges for long distance calls, which means that you need to add the expressions we got previously:
P = 0.05x + 0.12y (with P the total charge)
Hope this Helps! :)
