The equation shows direct variation
true or false ?

false.

Step-by-step explanation:

A direct variation equation is an equation where one fo the variable is equal to a constant times the other variable, we can write a general direct variation equation as:

y = k*x

Notice that the y-intercept is equal to zero in this type of equations.

Where y and x are the variables, and k is the constant.

In this case, we have the equation:

y = x - 7

Notice that in this equation we have a y-intercept equal to -7, which is different than zero.

Then the equation does not show direct variation, which means that the statement is false.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500