Question

Which equation could have been used to create this function table?




A. X Y
4 6
y = 4x 5 7
7 9
10 12
11 13


B.


y = 5x


C.


y = x + 7


D.


y = x + 2

Answer 1

A

Answer 2

@snowsurf

Answer 3

@whpalmer4

Answer 4

no guessing. explain why you chose A.

Answer 5

thought I had it figured out but now I don't know

Answer 6

I already know the answer. XD

Answer 7

@countsrnc It is simple math. You should first understand how these equations work to get those coordinates.

Answer 8

show me

Answer 9

?

Answer 10

people tell me different ways and I can't seem to grasp it, I thought I did

Answer 11

Hint:
To find x, you set the y=0. You will get a coordinate (x,0)
To find y, you set the x=0. You will get a coordinate (0, y)

Apply this method in the problem. By testing it in each equation. But this time, you don't use zeroes.

Answer 12

@countsrnc You now use the values in the table and test which equation shows the same values in x and y.

Answer 13

y=6
x=4 difference is 2 which makes it y=x+2

Answer 14

D

Answer 15

I would look at this by first checking if there is a simple constant difference between x and y. if so, the relationship is of the form \[y = x + c\]where \(c\) is a constant.

if that test fails, I then look to see if \{y/x\) always gives the same result, or in other words, \(y/x=c\) in which case the equation is of the form \[y=cx\]

if that fails, then I would use the equation for the slope of a line:\[m=\frac{y_2-y_1}{x_2-x_1}\]to find the slope of the line from two points, and then use the point-slope formula to get the equation for the line:\[y-y_1=m(x-x_1)\]

between those three tactics, you should be able to determine the equation from a table of linear data like this.