He didnt go over how to do it in class.

They are both linear

Step-by-step explanation:

1.

Use rise/run to find the slope of the line.

rise=21.8

run=1

therefore, the slope is 1/28. You can use that to graph the line. If the line meets the points on your table, it is linear. It does. The equation of the line would be y=21.8x.

2.

We can use the same process as before.

rise=7

run=2

Therefore, slope is 7/2. When this line is graphed it meets all the points, so it is linear.

Alteratively, you could graph the points first and then see if you get the same slope.

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