The equation that best represents this relationship is y = 8x
Equation of linear function
The standard linear equation is expressed as y = mx + b
writing the given information in a coordinate form (x, y) will give (18, 144) and (22, 176)
Determine the slope "m"
Slope = 176-144/22-18
Slope = 32/4
Slope = 8
Detremine the y-intercept
144 = 8(18) + b
b = 144 - 144
b = 0
Hence the equation that best represents this relationship is y = 8x
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