Help :D i don’t understand number 8 or 9

If the rate of change is -3, just subtract -3 from 14 (or make the equation to help you).

The equation for the first one is:

y = -3x + 14

When you plug in the x values, you get the y values:

(-2, 20), (1, 11), (3, 5), (4, 2), (6, -4)

For the second one, the start value is 2, meaning that is is y. This means that when 2 is plugged in for y, the result is 0 (x). Now we can make the equation:

y = 0.4x + 2

When you plug the x values in, you get the y values:

(-1, 1.6), (1, 2.4), (4, 3.6), (5, 4), (10, 6)

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m