help please help me question is down below

Question

 

The graph relates the temperature change yy (in degrees Fahrenheit) to the altitude change xx (in thousands of feet).

a. Choose the statement that best explains why the relationship is or is not proportional.

• The relationship is proportional because the line passes through the origin.

• The relationship is proportional because the line has a negative slope.

• The relationship is not proportional because the line passes through the origin.

• The relationship is not proportional because the line has a negative slope.

 

 

Question 2

b. Write an equation of the line. Interpret the slope.

The equation of the line is y=y= − 3510 x. The slope indicates that the temperature decreases by °F for each 1000-foot increase in altitude.

 

 

Question 3

c. You are at the bottom of a mountain where the temperature is 74°F. The top of the mountain is 5500 feet above you. What is the temperature at the top of the mountain?

The temperature at the top of the mountain is °F

 

Answer 1

a. Answer 4.

b. y=-35x/10=-3.5x where x is thousands of feet. The slope means that there is a drop of 3.5℉ in temperature for each 1000 feet increase in altitude.

c. Put x=5.5 in the equation: y=-19.25℉. So the temperature drops to 74-19.25=54.75℉.

Answer 2

4.3 Accelerated Big Ideas Math

Part A. Answer 1

Part B:

1.-3.5x

2. 3.5

3. 1000 foot decrease

Part C: 54.75
I hope I could help! :P