Posted by LaTesha on .
Find the rate of change and the equation for the following: f(4)=1 and f(8)=7

Pre Calculus 
bobpursley,
rate of change= 71)/(84)=6/4
f(x)=ratechange*x + b
f(4)=6/4 *4 + b or
1=6+b or b=5
equation: f(x)=6/4 x 5