Question

You sign up for karate classes. The classes cost

$
8
0
$80 per month.
Write an equation for the number of dollars,
d
d, that you pay for your karate classes if you take classes for
m
m months.
Complete the table for the missing values of
d
d.
m
m
d
d
1
1
8
0
80
2
2
3
3
4
4
3
2
0
320

Answer 1

d=80m

Explanation:

The classes cost $80. So when you start with 0 classes you have spent $0. But each month you add $80.

1....$80

2....$80+80

3....$80+80+80

So the dollars you spend is calculated by multiplying the rate $80 by the number of months m. The equation is d=80m.