Answer:
slope = - 3
Step-by-step explanation:
y = mx + b where m = slope
In this case y =-3x + 8, slope m = -3
The simplified form of given expression is 
<em><u>Solution:</u></em>
Given that we have to simplify the expression
<em><u>Given expression is:</u></em>

We can simplify the expression by multiplying each term in first bracket with each term term in second bracket


Simplify the above expression by multiplying the numbers in each term and adding the coefficients of like variables in each term

Combine the like terms


Thus the expression is simplified
let's recall the vertical line test, <u>for a function, if we run a vertical line anywhere it, it'll touch it only once</u>. is that true for a horizontal line? yeap.