Q. What is the slope of the function \(y = -2x – 3\)?

Answer

For a line \(y=mx+b\) the slope is \(m\). Here \(y=-2x-3\), so the slope is \(m=-2\).

Detailed Explanation

Solution — step-by-step

  1. Identify the slope-intercept form of a line. In slope-intercept form, a linear function is written as

    where is the slope and is the y-intercept.
  2. Write the given function and compare it to the slope-intercept form:

    Compare this with . The coefficient of is the slope.
  3. Read off the slope from the coefficient of :
    .
  4. (Alternative verification using two points) Find two points on the line, for example:
    • When , , so one point is .
    • When , , so another point is .

    Compute the slope between these two points using the rise over run formula:
    ,
    which confirms the slope found above.

  5. Final answer: the slope of the function is
    .
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Algebra FAQs

What is the slope of the function \(y=-2x-3\)?.

The slope is the coefficient of \(x\): \(m=-2\).\

What is the y-intercept of \(y=-2x-3\)?

The y-intercept is the constant term: the point \( (0,-3) \).

How do you interpret the slope \(m=-2\) in rise/run terms?

It means for each 1 unit increase in \(x\), \(y\) decreases by 2 units: rise/run = \(-2/1\)..

How would you graph \(y=-2x-3\) quickly?.

Plot the y-intercept \( (0,-3) \), then from there go right 1 and down 2 to get another point; draw the line through the points.

How do you find slope from two points \( (x_1,y_1) \) and \( (x_2,y_2) \)?

Use \(m=(y_2-y_1)/(x_2-x_1)\). For points on this line, that ratio will equal \(-2\).

What is the slope of a line parallel to \(y=-2x-3\)?.

What is the slope of a line parallel to \(y=-2x-3\)?.

What is the slope of a line perpendicular to \(y=-2x-3\)?

The perpendicular slope is the negative reciprocal: \(m= -1/2\).

How does slope relate to the derivative for \(y=-2x-3\)?.

The derivative \(dy/dx\) of a linear function equals its slope, so \(dy/dx = \(-2\).\)

How do you convert a standard form \(Ax+By+C=0\) to slope-intercept form to find slope?

Solve for \(y\): \(y=\left(-\frac{A}{B}\right)x-\frac{C}{B}\). The slope is \(-\frac{A}{B}\).
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