An object moves at a constant rate. the graph shows the object's height at different times. which equation represents the situation? a. y = −15x + 900 b. y = −15x − 900 c. y = 15x − 900 d. y = 15x + 900

Well we know the slope is negative so y=-15 then we can find the y intercept which is positive 900.  SO the correct answer would be A.

answer is a

y=-15x+900

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6