Question

is -2^2+3 a linear function? how can you tell?

Answer 1

thats just a line

Answer 2

i dont think it's a line...it doesnt even have a variable...

Answer 3

a horizontal line if f(x)= what you typed. i think you forgot something

Answer 4

ahh yes..now that's a line :D

Answer 5

otherwise this isnt even a function

Answer 6

just a constant

Answer 7

just a number in the big black space

Answer 8

the problem is "tell whether the function is linear. Evaluate when x=-2 ; F9x)=x^2+3

Answer 9

i think they meant 2x^2+3 in that case you can prove for every x value there is a y value. making it a function of y in respect to x.

Answer 10

x^2 + 3 is not linear though

Answer 11

correct; it's parabolic

Answer 12

so -2^2+3 it is linear then..?

Answer 13

-2^2 + 3..for the nth time is NOT a function....we're talking about x^2 + 3 here...it is not linear...it is quadratic

advise...in looking if a function is linear or not...do it before substituting...functions only exist if there is a variable

Answer 14

y=-2^2+3 is a constant so it is a line

Answer 15

x=-2^2+3 is vertical line but it not a function

Answer 16

@freckles the question is "tell whether the function is linear. Evaluate when x=-2 ; F(x)=x^2+3"

you tell whether the function is linear first THEN evaluate x = -2

Answer 17

For it to be a function it must pass the vertical line test and a vertical line doesn't do that