Question

Which of the following points are on the line given by the equation y = -3x +5? Check all that apply.

A. (-3, 14)
B. (3, -14)
C. (2, -1)
D. (-2, 11)

Answer 1

Well, I am here.

Answer 2

do you know what -3*-3 + 5 is ? (use order of operations: first do the multiply)

Answer 3

-4

Answer 4

a minus times a minus is a plus (one of those mysteries)
-3 * -3 is not -9

try again

Answer 5

9

Answer 6

ok
so what is
-3*-3 + 5 ?

Answer 7

14

Answer 8

Correct

Answer 9

So the answer would be A

Answer 10

what you just did was test
(-3, 14) (choice A)
we put in -3 for x in -3*x + 5 to get -3*-3+4 and got 14
that matches the 2nd number in (-3,14) so that is one of the answers.

Answer 11

ok

Answer 12

but we have to test the other choices

does choice B work ?
B. (3, -14)

that says use 3 for x in -3 * x + 5
can you replace the x with 3? what do you get ?

Answer 13

-4

Answer 14

yes, and notice -4 is *not* -14 in
(3,-14)
so choice B is *not* an answer.

can you check choice C ?

Answer 15

to check
C. (2, -1)

what number do we use for x in -3*x + 5 ?

Answer 16

-1 so yes

Answer 17

-3*2 + 5 = -6+5 = -1
yes, choice C is also an answer

one last choice to check. can you finish ?

Answer 18

yes thank you

Answer 19

and the last one is another answer

Answer 20

yes, good job

Answer 21

So its A C D

Answer 22

Great!