Answer:
7.
![y = 3x + 10](https://img.qammunity.org/2021/formulas/mathematics/middle-school/9lbd5hlhe84mbmfrtn8os7pq0pj4of0suj.png)
8. Correlation: The more they spend in advertising dollars, the more sales they will get.
Explanation:
The slope-intercept form is y=mx+b. The mx is the slope and the Y is the y-intercept.
All you have to do here is add the 3x to 10 so that the y is isolated.
y = 3x + 10
A correlation is like an "If... then" statement. But it's more written like:
"The more/less they do this, the number of this will increase/decrease."
The more they spend in advertising dollars, the number sales will increase.