Isabella starts heating up the pool filled with lukewarm water at 40° celsius. the following function describes the temperature change per minute: f(x) = 20x + 40°. how will the graph change if the temperature is at 20° at the start of the experiment?

How will the graph of this function change if the temperature is at 20° at the start of the experiment?

The line will shift vertically down by 40°.

The line will shift vertically up by 20°.

The line will shift vertically up by 40°.

The line will shift vertically down by 20°.

Answer : The line will shift vertically down by 20°.

f(x) = 20x + 40°

In f(x), the initial temperature is 40° celsius

If we change the initial temperature 40° celsius to 20° celsius, we replace 40 by 20 in f(x)

The graph will shift vertically when we change the y intercept 40 to 20

40 - 20 = 20

So the line will shift vertically down by 20°.

The graph is attached below.

ratio is 2 : 9

the answer is three

13.5 : 3

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.