Question

In many parades, flowers are used to decorate the floats. The table below shows the number of flowers used in each row of a parade float.

1

54
2

58
3

62
4

66

Which equation best describes these data?

Answer 1

Answer: C. n = 4r + 50

Explanation:

The equation is in the form: y =mx + c

y is the number of flowers used.

x is the row number.

Solving for m. Pick any two points. (1, 54) and (2, 58)

m = (Y₂ - Y₁) / (X₂ - X₁)

= (58 - 54) / (2 - 1)

= 4

Solving for c. Use a point to fill up the formula and find c; (1, 54)

y = mx + c

54 = 4 * 1 + c

c = 54 - 4

c = 50

Formula will therefore be;

y = 4x + 50

or;

n = 4r + 50