# For the function y=3x+2, how do you find the set of coordinates with x-values 1 and 3?

Aug 9, 2017

The coordinates are$: \left(1 , 5\right)$ & $\left(3 , 11\right) .$

#### Explanation:

Function $y = 3 x + 2$

For $x = 1 ,$

$\implies y = 3 \cdot 1 + 2$

$\implies y = 3 + 2$

$\implies y = 5$

So the first coordinate is $\left(1 , 5\right) .$

For $x = 3 ,$

$\implies y = 3 \cdot 3 + 2$

$\implies y = 9 + 2$

$\implies y = 11$

So the second coordinate is$\left(3 , 11\right) .$

So, the coordinates are$: \left(1 , 5\right)$ & $\left(3 , 11\right) .$