Identify the y-intercept for the relation y = x2 + x – 90 The y-intercept is

Bob had a satellite dish installed for his LCD television.  The depth (d) of the satellite dish can be modelled by the relation d = (-0.006w) (w – 60), where (w) represents the width, in centimetres. Find the depth of the dish when the width is 40 cm. The depth of the dish is:

The shape of a mountain can be modelled by the factored equation y = -0.05x(x – 30), where y represents the height of the mountain and x represents the horizontal distance.  Both measures are in metres. The width of the mountain is the distance from one x-intercept to the other. What is the width of the mountain (including units)? Use the “Desmos” graphing calculator to help determine the width:www.desmos.com The width of the mountain is

Identify the minimum or maximum value for the relation y = x2 – 4.  Indicate if it is a minimum or a maximum.

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 

Re-arrange the following equation into the form y = mx + b

What is the equation of the line that has a slope of 12 and a y-intercept of -11?

Points (-5, -8) and (-3, -4) are on a line. The y-intercept is -8. What is the equation of the line? hint: find the slope “m” first using slope formula:  m = y2 – y1 / x2 – x1

The length of the indicated side to the nearest tenth is:  

Children with vision problems often require: