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d.  8

Step-by-step explanation:

The perimeter of a triangle is the sum of the measures of the three sides.

For this triangle,

perimeter = PQ + QR + PR

We know PQ = 6, and QR = 4.

perimeter = 6 + 4 + PR

perimeter = PR + 10      Equation 1

We can find the perimeter using the given information.

perimeter = 3 * PQ

perimeter = 3 * 6

perimeter = 18

Now we replace perimeter with 18 in equation 1 and solve for PR.

18 = PR + 10

Subtract 10 from both sides.

8 = PR

PR = 8

function 2 has a greater rate of change than function 1

function 2 has a greater y-intercept than function 1

step-by-step explanation: