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bxbykyah
13.07.2019 •
Mathematics
Thomas wants to rent a lawn mower. he has to pay a fixed base cost plus a daily rate for renting the lawn mower. the table shows the amount of money, y, in dollars, that thomas has to pay for renting the lawn mower for x days: lawn mower rental number of days (x) rent (dollars) (y) 0 12 1 21 2 30 3 39 4 48 which equation best shows the relationship between x and y? y = x + 21 y = 9x + 21 y = 9x + 12 y = x + 12
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Ответ:
The correct option is 3.
Step-by-step explanation:
The table of values is
Number of days (x) Rent (dollars) (y)
0 12
1 21
2 30
3 39
4 48
It is given that Thomas wants to rent a lawn mower. he has to pay a fixed base cost plus a daily rate for renting the lawn mower. It means the relationship between x and y is linear.
The slope intercept form of a line is
where, m is slope and b is y-intercept.
Slope formula:
The line passes through (0,12) and (1,21). The slope of the line is
The slope of the line is 9. From the given table it is clear that the y-intercept or initial value of the function is 12.
Substitute m=9 and b=12 in equation (1).
The required equation is y = 9x + 12. Therefore the correct option is 3.
Ответ:
the same as the other person said, chicken.