Which of the following represent an exponential function? Select all that apply. * a) You travel on your bike at a constant speed of 20 miles per hour.
b) Each week you deposit $50 into your savings account.
c) An endangered species population is decreasing at a rate of 7.5%.
d) You earn $9.25 per hour at your part time job.
e) The high school population is growing at a rate of 5% per year.
Your fish tank fills with water at a rate of 1 gallon every minute.
A species of fly doubles in population each month during the summer months.
Your car depreciates at a rate of 9% each year.

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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