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3 years ago

Find the equation (in terms of x) of the line through the points (-2,3) and (4,-9) y =

Mathematics

2 answers:

ss7ja [257]3 years ago

6 0

Answer: y = -2x - 1

Step-by-step explanation:

We can calculate the slope from the two given points. Slope is the change in y per the change in x, sometimes called the rise (y) over the run (x)

Rise is (-9 -3) = -12

Run is (4 - (-2)) = 6

Slope = Rise/Run = -12/6 = -2

The line is y = -2x + b

Find b by using either of the two known points (solutions). I'll choose (-2,3) [because I like smaller numbers]

y = -2x + b

3 = -2*(-2) + b

b = -1 [That was only slightly easier than -9 = -2*(4) + b; b = -1]

The equation is y = -2x - 1

shepuryov [24]3 years ago

3 0

Answer:

y =5

Step-by-step explanation:

−9−7

5−5

−16

y=mx+b

5=(0)(7)+b

b=5

therefore y = 5

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3 years ago

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docker41 [41]

Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

Find the indicated limit, if it exists. limit of f of x as x approaches 9 where f of x equals x plus 9 when x is less than 9 and

SVEN [57.7K]

Answer:

B. 18

Step-by-step explanation:

For the function

$f(x)=\left\{\begin{array}{l}x+9,\ \ x$

we can find the value of the function for all x that are very close to 9 but are less than 9 and for all values of x that are very close to 9 but are greater than 9.

1. For $x$