Question

Can someone help me !

Answer 1

Yes?

Answer 2

The Function C=nr gives the circumference of a circle related to its radius, while the function A = nr^2 gives the area of a circle related to its radius.

Answer 3

is "n" the same thing as pi ?

Answer 4

Which statement is correct?
A) Both C= 2nr and A = nr^2 are linear functions, because they both contain r.
B) Only C= 2nr is a linear function because its graph is a line with the slope of 2n.
C) Only A= nr^2 is a linear function because it's graph is a line with a slope of n.
D) Neither C= nr nor A=nr^2 are linear functions, because they both contain n.

Answer 5

and yes n is pi.

Answer 6

linear functions have variable with an exponent of "1"

y = 3x
f = 8r
C = 2nr

Answer 7

if you graph r^2, you know that it is not a linear function, think of graphing x^2, its quadratic. For C, it has a slope of 2pi so its a linear function, think of graphing 5x, its linear.

Answer 8

im still confused

Answer 9

Ok, what do you think linear means, think about it, it has the word 'line' in it right? This is a linear equationy=x is a linear equation and the way you can tell is that it looks like a line. So if we were to graph what 2(pi)r it would look likeWhat does it look like? Is it a linear function?

Answer 10

yeah its linear cause the line is straight

Answer 11

Correct now lets look at quadratic equations, As you can see the graph isn't straight its a parabola (u-shaped line). Because when you plug in any value of x (negative or positive) into x^2, it will always be positive, that's why in both directions its always going up. Does that make sense? Think of this, if you plug in -5 into x^2=> -5*-5=? and when you plug 5 into x^2=>5*5=? what number do they equal to?