Urgent 20 points select each graph that shows a function and its inverse.

Graphically, two functions are inverses when either...

1) You can reflect the graph the graph about y = x.

2) The graph is the same if you switch the x and y axes.

Let's look at the graphs from left to right, call them 1, 2, 3, 4.

#1 is a reflection across that diagonal - so this is an inverse pair.

#2 is a reflection across the y - axis - not an inverse pair.

#3 is a reflection across the x - axis - not an inverse pair.

#4 is a reflection across the line y = -x - not an inverse pair as you change the signs while swapping the axes.

Thus graph #1 (the left most) is the inverse pair.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

1/6

step-by-step explanation: