Question

Hello, I am like NOT understanding linear, proportional, inversely proportional, non linear equations and graphs. SOMEONE HELP!

Answer 1

what is it that you don't understand?

Answer 2

um,,.... everything. :( how do u no which is which?

Answer 3

i no linear must have an exponent in the equation, and that linear must go through (0,0) but the rest i dont know

Answer 4

a linear equation represents a straight line on a graph. any equation of the form ax+by = c is a linear equation.

Answer 5

um. im in 7th grade. we learned y=mx+b

Answer 6

yes, that is the same as ax+by = c, where a = m, b = -1 and c = -b

Answer 7

we learned, y=slope times X plus or minus y intercept

Answer 8

you are right
ax+by = c is another way of representing the same equation.

Answer 9

o. thx. my teacher says that exponential (non linear) uses an exponent in the equation.... how do u find it on a graph??? my TCAP is tomoro!

Answer 10

so a linear equation represents a line, i.e y = mx+b is a linear equation. it is called a linear equation because as x changes, y changes linearly.
a non linear equation has an exponent. say y =x^2. x has an exponent 2. which means if you plot this graph, it won't be a straight line.

Answer 11

http://www.bbc.co.uk/schools/gcsebitesize/maths/images/graph_24.gif

Answer 12

but neither would an inversely proportional line. if it goes through two lines its inversely right? otherwise its not linear

Answer 13

http://www.school-for-champions.com/algebra/images/linear_equations-2_variable.gif
that is a linear equation.

Answer 14

a proportional equation means that y is proportional to x, i.e y =cx, where c is a constant.

Answer 15

inversely proportional means as x increases, y decreases. i.e y is proportional to 1/x
or y = c/x, where c is a constant.

Answer 16

so it doesnt go through 0,0?
OH! C or c over x. i thought that was inversely?

X

Answer 17

yeah in an equation y=mx+b is linear.... an exponent is non linear.... c over X is inversely..... and proportional is?????

Answer 18

for an inversely proportional graph, if x was 0, y would be infinity. so no, inversely proportional graphs dont go through 0,0

Answer 19

which is a parabala? cathryncausey94.blogspot.com/2010_12_01_archi...

Answer 20

okay lets take y = mx+b ------> linear equation
if b = 0, i.e , y = mx -----------> proportional equation.
if x and/or y has exponent other than 1, non linear
so if exponent of x = -1, b =0
y = mx^-1---------> y = m/x-------> inversely proportional

Answer 21

is that clear?

Answer 22

O... proportional is when the y intercept is 0 or not their! :) thanx.... in a functions table how would i know which was inversely and which was proportional

Answer 23

think about what the word proportional means. Suppose i tell you my profits are proportional to my sales. what does that mean? the more sales I have, the more profit I make. similarly , y = cx means that y is proportional to x. the constant c defines how proportional it is.

Answer 24

... im sorry. i dont speak math. :( ummm. in a functions table such as.... an input output table how would u no which was which? something about dividing and multiplying.

Answer 25

its not math, it is plain english. anyway. if you see that y = cx, then it is proportional. if y = c/x, it is inversely proportional