Question

You start out with $20 and then spend money in a store where every item is $3. Y = -3x + 20. Type how to graph the equation using the y-intercept and slope. Be sure to tell where you place the first point and how to find the location of the second point.

Answer 1

When x is 0, y is what?

Answer 2

20?

Answer 3

so you have one point (0,20)

Answer 4

when x is 1, y is what

Answer 5

not exactly sure...

Answer 6

y = -3x + 20

y = -3(1) + 20

y = -3 + 20

y = ???

Answer 7

20

Answer 8

maybe

Answer 9

no

Answer 10

-3+20 is the same as 20 - 3

Answer 11

inverse operation

Answer 12

20 - 3 = ???

Answer 13

17

Answer 14

so you have the second point (1,17)

Answer 15

Alternatively, you can start at the point (0, 20) and move 3 units down, then one unit to the right (since slope = rise/run = -3/1) to get to the next point (1, 17)

Answer 16

either way, you have 2 points: (0,20) and (1,17)

Plot them. Then draw a straight line through them.

Answer 17

thanks jim

Answer 18

yw