Question

Given the function g(x) = 8x - 2, find g(-2)

Answer 1

i think its 8?

Answer 2

i tackled a similar question before. you just have to substitute.

Answer 3

\( \color{Black}{\Rightarrow 8(-2) - 2 }\)
\( \color{Black}{\Rightarrow -16 - 2 }\)
\( \color{Black}{\Rightarrow -18 }\)

Answer 4

oh okay i did it wrong
thanks

Answer 5

well no worries I do it wrong too lol

Answer 6

?

Answer 7

g(x) = 8x - 2, find g(-2)

g(-2) sub -2 into x
g(-1) sub -1 into x
etc

so your equation is

g(-2) = 8(-2) - 2
g(-1) = 8(-1) - 2
g(0) = 8(0) - 2
etc...

Answer 8

the reason we use this notation is because it would be confusing to work with multiple functions if we made them all equal to y otherwise thus we call the function a letter like g or f.

Also, we write the variable that y changes in respect to next to the name of the function so that we can talk about a specific point in the function in an easier fashion, it also tells us the variable y is changing in respect to in a function.

that is why we use this notation g(x), f(x)...