How do i find the slope and y intercept ?
2 answers:
Here are the instructions. Then we'll do your specific problem.
Step 1: Solve the equation for y, and write it in the form y = mx + b.
Step 2: The slope is m, and the y-intercept is b.
Now let's start.
-2x - 5y = -20
To solve for y, we first add 2x to both sides.
-5y = 2x - 20
Now we divide both sides by -5.
Now we compare what we got with the form, y = mx + b.
We see that m = -2/5, and b = 4. m is the slope, and b is the y-intercept.
slope: -2/5
y-intercept: 4
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Answer:
D
Step-by-step explanation:
Parallel lines have the same gradient.
A line with a slope of zero is a horizontal line. Although two lines that have a slope of zero will result in two parallel lines, not all parallel lines are horizontal lines. Since the question is asking for which statement <u>must</u> be true, option A is incorrect.
If the slopes of two lines are negative reciprocals, they are perpendicular to each other. This is because the product of the gradients of 2 perpendicular lines is -1. Let the gradient of the first line be A and the other be B.
AB= -1
Thus, option B is incorrect too.
Undefined slopes gives vertical lines. Like option A, if two lines have an undefined slope, they will be parallel to each other. However since parallel lines are nit necessarily vertical lines, option C is also incorrect.