Mathematics: Complete the equation of the line through (2,-2)(2,−2)left parenthesis, 2, comma, minus, 2, right parenthesis and (4,1)(4,1)left parenthesis, 4, comma, 1, right parenthesis. Use exact numbers.

Complete the equation of the line through (2,-2)(2,−2)left

jolleyrancher78

23.01.2022

$y=\frac{3}{2}x-5$

Step-by-step explanation:

There are a couple of ways to solve this, depending on what you already know.

Point-Slope Form

y-y_1=m(x-x_1) where m is the slope and (x_1, y_1) is a point on the line.

First, calculate the slope using the two given points (x_1, y_1), (x_2, y_2) .

$m=\frac{y_2-y_1}{x_2-x_1}=\frac{1-(-2)}{4-2}=\frac{3}{2}$ .

Fill in the point-slope pattern

$y-(-2)=\frac{3}{2}(x-2) \\ y+2=\frac{3}{2}x-3 \\ y=\frac{3}{2}x-5$

There's the equation in slope-intercept form ( y=mx+b ).

Slope-Intercept Form

Use y=mx+b directly.

Find the slope just like the above, so $m=\frac{3}{2}$ .

Now, plug one of the points (either one!) together with m into

$y=mx+b\\-2=\frac{3}{2}(2)+b \\ -2=3+b \\ b=-5$

Now you know the value of b, so the equation for the line is

$y=\frac{3}{2}x-5$

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jennkoga

31.01.2020

Required Answer:-

Slope=m

$\dashrightarrow$ $\sf m={\dfrac {y_2-y_1}{x_2-x_1}}$

$\dashrightarrow$ $\sf {\dfrac {-4-5}{4+2}}$

$\dashrightarrow$ $\sf {\dfrac {-9}{6}}$

$\dashrightarrow$ $\sf {\dfrac {-3}{2}}$

$\dashrightarrow$ $\sf m=1.5$

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