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Do the y-values increase drcrease or stay the same as the x-value increases?
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What is the slope of a nonverticle line?
To find the slope of a non-vertical line you need two points on the line. Subtract the second y-value from the first y-value, and subtract the second x-value from the first x-value, then divide the first number calculated by the second number calculated. As a formula, it looks like this: slope = (first yvalue - second yvalue) / (first xvalue - second xvalue) Alternatively, if you know calculus, the slope at some x-coordinate a of the function f(x) = d/dx[f(x)] evaluated at a = f'(a).
How much will you pay for paint if you use a coupon?
You will pay less for the paint because you used the coupon than if you didn't use the coupon to buy the paint.Price of paint equals XValue of coupon equals YTotal price of paint equals X minus Y
