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
- 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. - Write the given function and compare it to the slope-intercept form:
Compare this with . The coefficient of is the slope. - Read off the slope from the coefficient of :
. - (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. - Final answer: the slope of the function is
.
See full solution
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 \(-\frac{A}{B}\).
AI homework help: finance, econ now.
Try our AI tools below.
Try our AI tools below.
252,312+ customers tried
Analytical, General, Biochemistry, etc.
Analytical, General, Biochemistry, etc.