Graphs part b

[main monolith]

.

[grizzled cedar]

x= a is a vertical line

so you want a vertical line that intersects the circle twice

consider the edge of the circles

[main monolith]

surely there are infinite possibilites

[grizzled cedar]

no

well yes

but the region for a is bounded

consider lines from -8 to 8

[main monolith]

what does that mean?

[grizzled cedar]

are you familiar with what a set of values means

the region of values does not go to any infinities

[main monolith]

nah i dont know what that means

i thought it did because x=a goes up and down to inf and -inf

[grizzled cedar]

this is not the same

the answer is -8<a<8

[main monolith]

Wy not root 8

[grizzled cedar]

ye

thats wat i meant

2root2<a<2root2

[main monolith]

so set of values is LIKE domain, but the line CAN go further, but then it doesnt satisfy whatever is wanted?

[grizzled cedar]

yes

exactly

[bright sand]

is this maths gsce?