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What is the slope of the line whose equation is -2y = -4x + 5

What is the slope of the line whose equation is -2y = -4x + 5-example-1
User Mayur
by
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2 Answers

21 votes
21 votes

Answer:

2

Explanation:

y=mx+b where m is the slope

to get y by itself you divide both sides by -2 resulting in

y= 2x+(-5/2)

2=m

User Asgaroth
by
3.6k points
26 votes
26 votes

Answer:

2

Explanation:

Rearrange:

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

-2*y-(-4*x+5)=0

STEP 1:

Pulling out like terms

1.1 Pull out like factors :

-2y + 4x - 5 = -1 • (2y - 4x + 5)

Equation at the end of step 1:

STEP 2:

Equation of a Straight Line

2.1 Solve -2y+4x-5 = 0

"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 -2y+4x-5 = 0 and calculate its properties

Graph of a Straight Line :

Calculate the Y-Intercept :

Notice that when x = 0 the value of y is 5/-2 so this line "cuts" the y axis at y=-2.50000

y-intercept = 5/-2 = -2.50000

Calculate the X-Intercept :

When y = 0 the value of x is 5/4 Our line therefore "cuts" the x axis at x= 1.25000

x-intercept = 5/4 = 1.25000

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 -2.500 and for x=2.000, the value of y is 1.500. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 1.500 - (-2.500) = 4.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

Slope = 2

Geometric figure: Straight Line

Slope = 2

x-intercept = 5/4 = 1.25000

y-intercept = 5/-2 = -2.50000

User Bhuvanesh Mani
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2.3k points