What is the slope of the line graphed below? (-1,3) (-2,-1)

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.

Which shows how to solve the equation 3/4x=6 for x in one step?