Iris wants to buy two necklaces, one for her sister and one for herself. the necklace for her sister cost $42.00 and the necklace for herself cost $28.00. the sales tax on the purchase is 8%. find the total cost of iris's purchases, including sales tax. if necessary, round your answer to the nearest cent.

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

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step-by-step explanation:

i need a picture

step-by-step explanation: