Answer:
4) y = 2x - 7
Step-by-step explanation:
First we have to find the slope by using the following formula....
let (3, - 1) be [tex](x_{1}, y_{1} )[/tex], let (8, 9) be [tex](x_{2} ,y_{2} )[/tex], and m be the slope, then....
[tex]m = \frac{y_{2} -y_{1} }{x_{2} - x_{1} } = \frac{9 + 1}{8 - 3} = \frac{10}{5} = 2[/tex]
Now that we know the slope we can find the equation of the function by using point-slope for of the function which look like this.....
[tex]y -y_{1} = m(x - x_{1} )\\y + 1 = 2(x - 3)\\y + 1 = 2x - 6\\y = 2x - 7[/tex]
