Please try your best and answer 7, 8 and 9

7) A

8) 1/2

9) 5000

Step-by-step explanation:

7)

(0, 0), (4, -10)

The line goes through point (0, 0), the origin, so its equation is of the form

y = mx, where m = slope

m = (-10 - 0)/(4 - 0) = -10/4 = -5/2

Equation: y = -5/2 x

A

8)

(0, 0), (2, 1)

The line goes through point (0, 0), the origin, so its equation is of the form

y = mx, where m = slope

m = (1 - 0)/(2 - 0) = 1/2

Equation: y = 1/2 x

1/2

9)

The value of the house increases $5000 per year, so we multiply the number of years, x, by 5000 to find the increase after x years.

Equation: y = 5000x

5000

A unit rate is the price per object.

For example, lets say each apple costs $2. The unit rate is 42 per apple.