1. Find the scale factor ab has been increased by to get a’b’
7.5/5=1.5
The scale factor is 1.5
2. Find a’
4x1.5=6
Therefore 6 is a’
Hope this helps
#25
210 / 0.42 = 500
answer: 500 people were surveyed
#18
22.50 x 1.15 = 25.875
answer: $25.88 (third choice)
#19
550 x 0.07 = $38.50
answer: $38.50 (third choice)
#20
$160 x 0.4 = $64
answer: $64 (third choice)
The domain is all real numbers
The range is y<= 4
Choice C
Domain: The set of possible values of x
Range: The set of possible values of y
Zeros: The x-intercepts (what value of x is on the x-axis)
Discontinuities: Where the graph stops (and restarts somewhere else)
Asymptotes: The graph cannot cross this line (vertical, horizontal, oblique)
Out of the given choices, the phrase that best describes a nonlinear function is letter A. The area of a circle as a function of the radius. This is because area is calculated through the equation,
A = πr²
All the rest of the choices presents linear functions.