Question

10 points!!! Please help!!!!!!!

Answer 1

First find slope
5-10/-1-0= 5

find y-intercept
10=5(0)+B
b=-10

equation: y=5x-10

Answer 2

Exponential functions are in the form $ab^{x}$. In this equation, $b$ can be determined by figuring out the "common ratio" or the multiplier: the number that you have to multiply each $y$ value to get the next $y$ value. So, what do you have to mulriply $5$ by to get $10$. Or $10$ by to get $20$. Your answer to that question is your $b$. 

To get your $a$, you simply need to find the $y$ value that corresponds to an $x$ value of $0$. So, from the chart, what $y$ value corresponds to $x=0$?

Now, just substitute the $a$ and $b$ you found into $ab^{x}$ and you've got your exponential function.