Algebra; HELP PLEASE.
posted by He's not all bad like his reputation </3 on .
I don't understand the topic we're learning in math. /:
Provide an explanation, steps on how you figured the answer out, and of course, the answer.
Tell whether the table represents an exponential function. If so, write a rule for the function.
x: 2, 1, 0, 1, 2
y: 25, 5, 1, 1/5, 1/25

well, let's see if y = a^x
if x = 2, y = 1/25
so
1/25 = a^2
1/5 = a
so try
y = (1/5)^x
test x = 2
y = (1/5)^2
y = (1)/(1/5)^2 = 1/(1/25) = 25
that sure is promising