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PLEASEEEE I NEED HELP, 8TH GRADE MATH

PLEASEEEE I NEED HELP, 8TH GRADE MATH-example-1
User Cardamom
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Answer:

(6, ....... ) ( -3, .........) ( 1, .......)

x,y values therefore = (6, 29) ( -3, -34) (1, -6)

as x = 0 when y = -13

we simply x 6 into equation to find 30

y = 7 x 6 -13

y = 42 - 13

y = 29

Then for -3 we simply x by -3 to find y

y = 7 x -3 -13

y = -21 - 13

y = -34

then for 1 we simply x by 1 to find y

y = 7 x 1 -13

y = 7 - 13

y = -6

y = 7x - 13

Step 1) Set above equation equal to 0 by remembering the methods;

Solve y-7x+13 = 0

Step 2) Calculate the y intercept;

Notice that when x = 0 the value of y is -13/1 so this line "cuts" the y axis at y=-13.00000 see attached to help memorize.

Step 3) Calculate the X-Intercept :

When y = 0 the value of x is 13/7 Our line therefore "cuts" the x axis at x= 1.85714

Step 4) Calculate the Slope :

Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is -13.000 and for x=2.000, the value of y is 1.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 1.000 - (-13.000) = 14.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

Slope = 14.000/2.000 = 7.000

As seen below.

x-intercept = 13/7 = 1.85714

slope = 14000/2000 = 7000

x intercept = 13/7 = 1.85714

y intercept = 13/1 = 13.00000

PLEASEEEE I NEED HELP, 8TH GRADE MATH-example-1
PLEASEEEE I NEED HELP, 8TH GRADE MATH-example-2
PLEASEEEE I NEED HELP, 8TH GRADE MATH-example-3
User Jozi
by
8.0k points
5 votes
You can plug the given number in for x, for example y= 7(6)-13 and that will give you the y, and 7(6)-13 can just be plugged into a calculator
User MVTC
by
9.3k points

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