How do you find the slope given 5y - 2x = -3?

3 Answers
Mar 20, 2018

m=2/5

Explanation:

Given the equation of a line, all we need to do is rearrange it into terms of y=mx+b

5y-2x=-3
5y=2x-3 Add -2x to both sides to get y by itself
y=2/5x-3/5 Divide all terms by 5

Now that the equation is in terms of slope-intercept, with the slope being m in y=mx+b, you can find the slope.

Mar 20, 2018

See a solution process below:

Explanation:

We can multiply each side of the equation by color(red)(-1) to put the equation in Standard Linear Form. The standard form of a linear equation is: color(red)(A)x + color(blue)(B)y = color(green)(C)

Where, if at all possible, color(red)(A), color(blue)(B), and color(green)(C)are integers, and A is non-negative, and, A, B, and C have no common factors other than 1

color(red)(-1)(5y - 2x) = color(red)(-1) * -3

(color(red)(-1) xx 5y) - (color(red)(-1) xx 2x) = 3

-5y - (-2x) = 3

-5y + 2x = 3

color(red)(2)x + color(blue)(-5)y = color(green)(3)

The slope of an equation in standard form is: m = -color(red)(A)/color(blue)(B)

Substituting gives:

m = (-color(red)(2))/color(blue)(-5) = 2/5

Mar 20, 2018

slope=2/5

Explanation:

So you're going to want to get it into mx+b=y form, where m is the slope and b is the x intercept.

To rearrange the equation:
5y-2x=-3
add 2x to each side, which cancels out -2x from the left side
5y=-3+2x
now divide each side by 5, which crosses out the 5 in 5y
y=(-3+2x)/5

You now have the correct arrangement of the equation and can even flip -3 and 2x to match the form of the equation you want it in

y=(2x-3)/5

Now since you have the equation being divided by 5, you have to divide both 2 and 3 by 5, making your new equation:
y=(2/5)x-(3/5)

and following the equation we can now see that m, which is the slope, is equal to 2/5.