A runner ran 2/3 of a race in `21` minutes. They ran the entire race at a constant speed. Is the relationship between time and distance proportional?

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step-by-step explanation: vsfdvsfvd

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72