Katrina is going to order sweatshirts for her girls mentoring group. the sweatshirts will have the group logo printed on the front. katrina asks two local companies to give her a price. MH designs will charge $21.50 for each of the sweatshirts.
print rich will charge $18 for each sweatshirt plus a one-time setup cost of $70.
justify how to determine the number of sweatshirts katrina would need to order from each company for the costs to be the same.

y=mx+b

step-by-step explanation:

m slope, b y-intercept

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.