The pool company has learned that, by pricing a newly released fun noodle at $1, sales will reach 5000 fun noodles per day during the summer. raising the price to $4 will cause the sales to fall to 2000 fun noodles per day. the equation is?

Step-by-step explanation:

lope is (13000-15000)/(5-3)=-2000/2=-1000

point slope formula: y-y1=m(x-x1), m slope and (x1,y1) a point

y-15000=-1000(x-3)

y-15000=-1000x+3000

y=-1000x+18000

when x=$3.50

y=-3500+18000=14,500 noodles predicted to be sold.

coins of silver or gold

step-by-step explanation:

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

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

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form