Question

Can someone help me again please

Answer 1

a.) 23 degrees Celsius

b.) y=23-5x

btw I'd rearrange this as

y= -5x+23

If you want to find changes in y, let's compare differences when we change the x.

For example, if x=1

y= -5(1)+23

-5+23=18

So, when x=1, y=18

Now, let's have x=2

y= -5(2)+23

-10+23=13

So, when x=2, y=13

Let's compare the difference in y by subtraction.

18-13=5

So, with every kilometer that you fly up from the surface, the temperature decreases by 5°C

So, in the box, put -5

Answer 2

i) = 23 °C

ii) = 4.4° C

Explanation:

i) The temperature on the surface of the planet.

At the surface of the planet the height is Zero

Therefore, X = 0

Thus; using the equation, the temperature, y will be;

y = 23 - 5x

y = 23 - 5(0)

= 23 °C

ii) the temperature change for every kilometer from the surface,

From the equation;

y = 23 - 5x

we take, y to be 1

Therefore;

1 = 23 -5x , subtracting 23 on both sides we get

-22 = -5x

x = -22/-5

= 4.4° C