Please answer part a and b thank you!! and don't forget to show proof

Step-by-step explanation:

First part

y-intercept of the line means where the line crosses the y-axis

Here we can see that the line crosses the y-axis at 4 so the y-intercept is 4 hence (0 , 4) is the point.

Second part

The point (0 ,4) represents 0 hours after sunrise the temperature is 4°C(degree Celsius) which means when the sun has not risen the temperature is 4 degrees

goog may have it for you

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98