To find rate of change, you find the change in the output values compared to the change in the input values and write it as a fraction
f(7) is
when x is 7, y=24
f(10) is
when x is 10, y=66
the difference in the y values is 42 when the x values change by 3
the average rate of change is 14
Functions are accurate through having one x intercepts which is how you can find which are functions or not.
Answer- B,D,E
Answer:
1) y = 0.3x + 1000
2) slope = 0.3
The slope is the fraction of the monthly sales that is added to your salary.
3) y-intercept = 1000
The y-intercept is the fixed part of the salary, $1000.
4) The salary is $2500
Step-by-step explanation:
1)
monthly salary = fixed part + variable part
The fixed part is $1000. Every month you receive $1000 no matter the amount of sales.
The variable part varies according to the amount of sales. You get 30% of the of the monthly sales. Let the monthly sales be x. The variable part is 0.3x
Let the monthly salary = y.
y = 1000 + 0.3x
y = 0.3x + 1000
2)
slope = 0.3
The slope is the fraction of the monthly sales that is added to your salary.
3)
y-intercept = 1000
The y-intercept is the fixed part of the salary, $1000.
4)
In this case, x = 5000
y = 0.3x + 1000
y = 0.3(5000) + 1000
y = 1500 + 1000
y = 2500
The salary is $2500.
Number of equal parts:
4+ 10= 14 (parts)
The value of each part is:
308 diapers/ 14 parts= 22 diapers/ parts
Really dirty diapers account for 4 parts, so the number of really dirty diapers is:
22 diapers/ 1 part* 4 parts= 88 diapers.
There are 88 really dirty diapers~