Mathematics, 24.08.2019 06:30 jaleelbrown80

How do you graph an equation in two variables?

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Answer from: Crxymia

(x,y)
there are 2 easy ways, number 2 works better with y=mx+b form equations
1. subsitute and graph points
2. find y-intercept and slope

1. subsitute
lets say you have the equation
y=3x+4
if x=3 then y= subsitute 9+4=13
so one point is (3,13)
subsitte 0 for x
if x=0 then y=4
(0,4) is another point,
plot the line with points (3,13) and (0,4)

2.
find y intercept
in y=mx+b form, b= y intercept or where the line crossses the y axis
so if you had y=3x+4 the line would cross the y axis at (0,4)
and if you had y=3x-4 it would cross at (0,-4)
m=slope
rise divided by run or (how far it goes up)/(how far it goes to the right)
slope=3/1

Answer from: Quest

step-by-step explanation:

Answer from: Quest

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

step-by-step explanation:

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

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