Question

hey guys, sal here

i was wondering if you fellas could help me with these functions?

Answer 1

http://vvcap.net/db/9KWxL68W2p-0wUCsfgeS.htp

Answer 2

F(3)= 3x+1?? for the first one?

Answer 3

ok i will show work for the first one .follow the same for the second one

since twwo points are given
(3,1) and (7,13)
find the slope
\[m=\frac{\Delta y}{\Delta x}\]
m=(13-1)/(7-3)=12/4=3
using point slope form
y-y0=m(x-x0)
y-1=3(x-3)
y-1=3x-9
y=3x-8
f(x)=y=3x-8

Answer 4

Given that f is a linear function : f(x) = mx + b, and
f(h) = k, f(m) = n
for instance, then we have
\[\large y - k = \frac{n-k}{m-h}(x - h)\]
\[\large y = \frac{n-k}{m-h}x + h\left( \frac{k-n}{m-h} \right)+k\]

Answer 5

awesome guys, thanks!