Math

QuestionFind the slope, yy-intercept, and equation for the points (16, -1), (12, -2), (8, -3), (4, -4).

Studdy Solution

STEP 1

Assumptions1. The given values are points on a line in a two-dimensional space. . The line is linear and has a constant slope.
3. The equation of the line is in the form y=mx+cy = mx + c, where mm is the slope and cc is the y-intercept.

STEP 2

First, we need to find the slope of the line. The slope is calculated as the change in yy divided by the change in xx.
m=ΔyΔx=y2y1x2x1m = \frac{\Delta y}{\Delta x} = \frac{y2 - y1}{x2 - x1}

STEP 3

Now, plug in the given values for y2y2, y1y1, x2x2, and x1x1 to calculate the slope. We can use any two points from the table, but for simplicity, let's use the first two points (16, -1) and (12, -2).
m=2(1)1216m = \frac{-2 - (-1)}{12 -16}

STEP 4

Calculate the slope.
m=14=0.25m = \frac{-1}{-4} =0.25

STEP 5

Now that we have the slope, we can find the y-intercept. The y-intercept is the value of yy when x=0x =0. We can find this by rearranging the equation of the line and solving for cc.
c=ymxc = y - mx

STEP 6

Plug in the values for mm, xx, and yy from any point on the line. Let's use the first point (16, -1) for simplicity.
c=10.25×16c = -1 -0.25 \times16

STEP 7

Calculate the y-intercept.
c=14=5c = -1 -4 = -5

STEP 8

Now that we have the slope and the y-intercept, we can write the equation of the line.
y=mx+cy = mx + c

STEP 9

Plug in the values for mm and cc to write the equation of the line.
y=.25x5y =.25x -5The equation of the line is y=.25x5y =.25x -5.

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