Write an equation of the line passing through (-5,4) and having slope -7

y = - 7x - 31

the equation of a line in slope-intercept form is

y = mx + c ( m is the slope and c the y-intercept )

here m = - 7

y = - 7x + c ← is the partial equation

to find c substitute (- 5, 4 ) into the partial equation

4 = 35 + c ⇒ c = 4 - 35 = - 31

y = - 7x - 31 ← equation in slope-intercept form

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

a. is correct