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2 years ago

Help asap will mark brainliest

Mathematics

2 answers:

Harrizon [31]2 years ago

8 0

Answer:

Step-by-step explanation:

7-5

-21-0

-2/21. the y intercept would be 5, considering the x is 0 on the first pair of coordinates. so y=-2/21x+5, or A

ki77a [65]2 years ago

7 0

Answer:

y = -2/21(x)+5

Step-by-step explanation:

We know that the formula to find the slope of an a line y = mx + b where m is the slope and b is the y-intercept.

The formula of slope is m = (y2-y1)/(x2-x1)

Using the two points given, we can find the slope:

m = (7-5)/(-21-0)

m = -2/21

b = 5 because (0,5) is the y-intercept

y = -2/21(x)+5

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tigry1 [53]

Answer:

(a) Brenda saved $23.50.

(b) The rate at which Brenda is saving money is 0.5 dollars per day.

(c) money saved on $J(14)$ is $27.

Step-by-step explanation:

Given:

Initial amount in the jar is, $J(0)=\$20$

Amount in the jar after a week or 7 days is, $J(7)=\$23.50$

Brenda is saving money at a linear rate.

(a)

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Therefore, total money saved by Brenda is equal to the money saved at the end of the week. So,

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(b)

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Here, $x_1=0,x_2=7, f(x_1)=J(0),f(x_2)=J(7)$

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Therefore, the rate at which Brenda is saving money is 0.5 dollars per day.

(c)

A linear function is of the form $f(x)=mx+b$ , where 'm' is the rate and 'b' is the initial value of the function.

Therefore, the linear function for the money saved by Brenda can be written as:

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$J(14)=0.5\times 14+20\\J(14)=7+20=\$27$

Therefore, money saved on $J(14)$ is $27.

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