Answer:
m=-2
Explanation:
If a line passes through the points (4,5) and (2,9): to calculate the slope, use the formula below:

Substituting the points, we have:

The slope of this line is -2.
Answer:
No
Step-by-step explanation:
Answer:
it is easier to multiply first and then to place the decimal point. Multiply the factors as if they were whole numbers. Disregard the decimal point until you place it in the product.
recall, slope = rise/run, and that a fraction is undefined when the denominator is 0, meaning this slope has a run = 0.
to make it short, when the slope is undefined, is a flag that we simply have a vertical line. Check the picture below.