Please answer this I need help

What is the value of the digit 1 in the number 13?

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?