Identify whether each relation is linear or quadratic.

Ben’s work for solving this system of equations is shown below.  All his work is correct. Which method is he using? System:y = -5 – x 2x + y = 20 Ben’s solution:2x + (-5 – x) = 20 x – 5 = 20 x = 25 y = -5 – (25) y = -30

Jacob goes mountain climbing on a mountain with an arched shape that can be modelled by the equation:y = -0.04×2 + 4.8x, where y represents the height in feet and x represents the horizontal distance in feet.  Use the “Desmos” graphing calculator to determine the height of the mountain. www.desmos.com The height of the mountain is 

What is the height of the platform?

Identify the y-intercept of this quadratic relation:   

If a parabola opens up, then it has a maximum.

If ELIMINATION is the method used to solve this system of equations, what is the result of the first step? x + y = 6 x – y = 2

Mr. Bissada is teaching the method of SUBSTITUTION to solve a system of equations to his class.  What would be the first step that he should follow? y = 3x -2x + 8y = -2

Find the zeroes for the relation y = x2 + x – 90 by factoring. The coordinate(s) of the zero(s) is / are: 

Which of the following is the main disadvantage for Solving a System of Equations using the method of Graphing to find the POI?