Pls help its a test and i rly need the help

15

Step-by-step explanation:

A constant is a term that can't change its value.

You can change the value of x and y, but you can't change the value of 15.

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    2*x+8*y-(15)=0

STEP

1

:

Equation of a Straight Line

1.1     Solve   2x+8y-15  = 0

Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).

"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

m is the Slope or Gradient i.e. how steep the line is

b is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the line properties. We shall now graph the line  2x+8y-15  = 0 and calculate its properties

Graph of a Straight Line :

Calculate the Y-Intercept :

Notice that when x = 0 the value of y is 15/8 so this line "cuts" the y axis at y= 1.87500

 y-intercept = 15/8  =  1.87500

Calculate the X-Intercept :

When y = 0 the value of x is 15/2 Our line therefore "cuts" the x axis at x= 7.50000

 x-intercept = 15/2  =  7.50000

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 1.875 and for x=2.000, the value of y is 1.375. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 1.375 - 1.875 = -0.500 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

   Slope     = -0.500/2.000 = -0.250

Geometric figure: Straight Line

 Slope = -0.500/2.000 = -0.250

 x-intercept = 15/2 = 7.50000

 y-intercept = 15/8 = 1.87500

The coordinate plane where the point is 1 unit to the left and 3.5 units down

Step-by-step explanation:

On a coordinate plane the negative side is left and down and positive is up and right so you can eliminate any answer with up or right. The point says its (-1,-3.5) which means it will be 1 to the left making it -1 and 3.5 down which will make it -3.5.