Answer:
Because X (10) repeats
Step-by-step explanation:
A function has no repeated X but here in your x variable 10 is there twice so therefore it is NOT a function
You can use the pencil test also in a graph, align your pencil vertically and see if there are multiple points that have the same X and if there isn't any repeated its a function.
Based on the calculations, the slope of line YZ in simplest form is equal to 2.
<h3>How to determine the slope of YZ?</h3>
Mathematically, the slope of a straight line can be calculated by using this formula;

Since points X, Y, and Z are collinear, we can deduce that the line passes through line Z at 6 units form the origin and 3 units for Y from the origin.
Substituting the parameters into the formula, we have;

Slope, m = 6/3
Slope, m = 2.
Read more on slope here: brainly.com/question/17601248
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Answer:
A. 2x + 15
Step-by-step explanation:
3(2x + 5) - 4x =
= 6x + 15 - 4x
= 2x + 15
Answer: A. 2x + 15