What is the slope of a line that goes through (0,6) and (6,0)

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

Do you mind if you guys me with this question i’m on number 8