Question

Is (-3,4) (0,19) and (2,9) ordered pair of the solution y=-5x+19

Answer 1

For to find out which coordinates/points are in the line, all you have to do is plug in the values of x and see if the value of y will coincide with that of its ordinate.
Let's take the first one
y=-5x + 19
(-3,4)
Plug in th evalue of x
y = -5(-3) + 19
y = ?

Answer 2

@AndreaGreer

Answer 3

So yes an ordered pair (-3,4)?

Answer 4

what's the value of y from above equation?

Answer 5

It don't tell me it just shows y=-5x+19 then they want to know if (-3,4) is an ordered pair

Answer 6

that's why were getting the value of y when x is plugged in to the equation to know whether the coordinates are the points of the line or not

Answer 7

Yes so yes (-3,4) would be ordered pair

Answer 8

Taking the first coordinates you'll have
y=-5x + 19
(-3,4)
Plug in th evalue of x
y = -5(-3) + 19
y = 34 ----not ok! since 4 is the y-coordinate

For the second point
(0,19)
y=-5x + 19
y = -5(0) + 19
y = 19 ok! since 19 is the ordinate of the point

For the third one
(2,9)
y=-5x + 19
y = -5(2) + 19
y = -10 + 19
y = 9 ---ok! since in the ordered pair (2,9), 9 is the y-coordinate