The problem actually starts at number 13! Because the answer is partially correct.
The explicit function for the sequence shown is actually y=-10 + -10(n-1)
The way to test out if that is the correct function is by testing if the first number is actually -10.
y= -10 + -10(1-1) (Note: you plug in 1 into because we're testing the FIRST Number of the sequence.) y= -10 - 10(0) y= -10
It tested correct! Now let's make sure with the fourth sequence to ensure the function is correct. We'll do this by plugging in 4, and making sure we get -40.
y= -10-10(4-1) y= -10-10(3) y= -10-30 y=-40
Okay! So our function is correct. Now, we find the 50th number by plugging in 50.
