Which points are on the graph of f(x) = 5x?
(2, -25)
(0,1)
(2,10)
(-1, 1/5)

Question

Which points are on the graph of f(x) = 5x?
(2, -25)
(0,1)
(2,10)
(-1, 1/5)

anonymous · Answer

Surely this isn't so difficult? just take each X value and multiply it by 5, see if it matches the Y value

anonymous · Answer

so... c? though, the question asks for multiple so i feel like theres more...

just making sure, you're saying all i have to do is say... with (2,10), 2 x 5, and if it equals the other number (10) then its correct?

anonymous · Answer

yeah, that's all a function is. if f(x)=5x, then you do to x whatever the function says. points on f(x) if it were a line would be 1, 5    2, 10     3, 15     4, 20.... and so on. 

if it were f(x)=2x, it'd be 1, 2        2, 4        3, 6       4, 8       5, 10... and so on...

anonymous · Answer

C

anonymous · Answer

thanks, sorry if it was kinda obvious but ive been really busy lately so i fell behind in my classes xd

anonymous · Answer

Oh no, maths is all about learning little tricks to make life easier. Don't worry about it!